2D	2-Dimensional
3ACC	3A Central Control
3D	3-Dimensional
3M	Minnesota Mining and Manufacturing
4GL	Fourth Generation Language
4H	Head, Heart, Hands, Health
5XBCOER	5 X-Bar Central Office Equipment Reports system, "5XB COER"
AAAAAA	Association for the Abolition of Abused Abbreviations and Asinine Acronyms
AAA	American Automobile Association
AAA	Anti-Aircraft Artillery
AA	Administrative Assistant
AA	Affirmative Action committee
AAAL	American Academy of Arts and Letters
AA	Alcoholics Anonymous
AA	American Airlines
AA	Antiaircraft Artillery
AAAS	American Association for the Advancement of Science
AA	Associate in Accounting
AA	Astronomy and Astrophysics, "A&A"
AA	Automobile Association (in England)
A	Aftermath
AAII	American Association of Individual Investors
AAMOF	As A Matter Of Fact
AAMSI	American Association for Medical Systems Informatics
AAO	Anglo-Australian Observatory
AAP	Affirmative Action Program
AARC	Anglo-American Cataloging Rules
AARP	Appletalk ARP
AAS	American Astronomical Society
AAS	Atom Absorption Spectrometry
AAVSO	American Association of Variable Star Observers
AAX	Automated Attendant eXchange
ABA	American Bar Association
ABA	American Basketball Association
ABA	American Booksellers Association
AB	Able Bodied seaman
ABATS	Automatic Bit Access Test System
ABBR	ABBReviation
ABC	American Broadcasting Company
ABEL	Advanced Boolean Expression Language (a Data-I/O Trademark)
ABHC	Average Busy Hour Calls
ABI	American Bell Inc
ABI	Application Binary Interface (SunOS and SV application sw interface std)
ABM	Asynchronous Balanced Mode
ABP	Alt.Binary.Pictures
ABPE*	Alt.Binaries.Pictures.Erotica.* (.bondage, .leather, etc.)
ABS	Acrylonitrile Butadiene-Styrene (plastic)
ABS	Alternative Billing Service
ABS	American Bureau of Shipping
ABS	Anti-Blocking System
ABSBH	Average Busy Season Busy Hour
ACAA	Agricultural Conservation and Adjustment Administration
AC	Access Control
AC	Adaptive Control
AC	Alternating Current (ac, see also DC)
AC	Answer Center (Sun)
AC	Ante Christum (before Christ)
AC	Ante Cibum (before meals)
ACAWS	Advisory, Caution, And Warning System
ACB	Annoyance Call Bureau
ACBL	American Contract Bridge League
ACC	Argonne Code Center
ACC	Audio Communications Controller
ACCRA	American Chamber of Commerce Research Association
ACCS	Army Command and Control System
ACCS	Automated Calling Card Service
ACCT	Account
ACDA	Automatic Call Disposition Analyzer
ACD	Automatic Call Distributor [telephony]
ACE	Advanced Composition Explorer
ACE	Advanced Computing Environments [Corporate name]
ACE	Automatic Calibration and Equalization
ACE	Automatic Calling Equipment
ACF	Advanced Communications Functions
ACH	Attempt per Circuit per Hour
ACHEFT	Automated ClearingHouse Electronic Funds Transfer
ACIA	Asynchronous Communications Interface Adapter
ACK	ACKnowledge
ACK	Amsterdam Compiler Kit
ACL	Access Control List
ACL	Advanced Cmos Logic
ACLU	American Civil Liberties Union
ACM	Access Control Machine
ACM	Association for Computing Machinery
ACO	Acronym Control Officer
ACOF	Attendant Control Of Facilities
ACP	ACtion Point
ACRNEMA	a medical imaging standard, "ACR/NEMA"
ACRV	Assured Crew Return Vehicle (or) Astronaut Crew Rescue Vehicle
ACS	Advanced Communications System
ACS	Australian Computer Science
ACSE	Association Control Service Entity (ISO/CCITT layer 7)
ACSNET	Acedemic Computing Services NETwork
ACSU	Advanced t-1 Channel Service Unit
ACTPU	ACTivate Physical Unit (SNA)
ACTS	Advanced Communications Technology Satellite
ACTS	Automated Coin Toll Service
ACTS	Automatic Coin Telephone Service  [telephony]
ACTUP	AIDS Coalition To Unleash Power, "ACT UP"
ACU	Alarm Control Unit
ACU	Automatic Calling Unit
ACW	Alternating Continuous Waves
ACWP	Actual Cost of Work Performed
ADA	Air Defense Artillery
ADA	Alternate Delay Accumulation
AD	Addendum
AD	After Date
AD	Analog to Digital converter, "A/D" (see ADC)
AD	Anno Domini (in the year of our Lord)
AD	Application Development
ADB	A DeBugger
ADB	Apple Desktop Bus
ADC	Analog to Digital Converter
ADCCP	Advanced Data Communications Control Procedure
ADCI	Automatic Display Call Indicator
ADD	Advanced Dungeons & Dragons, "AD&D"
ADDCP	Advanced Data Communication Control Procedure
ADEW	Andrew Development Environment Workbench
ADF	Automatic Direction Finder
ADFRF	Ames-Dryden Flight Research Facility (was DFRF) (NASA)
AD(H)D	Attention Deficit (Hyperactivity) Disorder
ADI	Acceptable Daily Input
ADI	Anolog Device Inc
ADM	Additional Dealer Markup
ADM	ADMiral
ADM	Advanced Micro Devices
ADMD	Administration Management Domain
ADN	Abbreviated Dialing Number
ADP	Adenosine Di-Phosphate
ADP	Administrative Data Processing
ADP	Advanced Data Processing
ADP	Automatic Data Processing
ADPCM	Pulse Code Modulation with Adaptive Quantization
ADSL	Asymmetric Digital Subscriber Line
ADS	Advanced Digital System
ADS	Application Development System
ADS	Audio Distribution System
ADS	Automatic Voice System
ADS	Auxilary Data System
ADSP	AppleTalk Data Stream Protocol
ADSR	Attack Decay Sustain Release
ADT	Abstract Data Type
ADT	Atlantic Daylight Time
AEA	American Electronics Association
AEA	Atomic Energy Authority
AE	Application Entity/Environment/Execution/Engineering (APE)
AEC	Architectural Engineering Construction
AEC	Atomic Energy Commission
AEF	American Expeditionary Force (see BEF)
AEGIS	Advanced Electronic Guidance and Instrumentation System
AES	Application Environment Specification
AFACTS	Automatic FACilities Test System
AF	Address Family (sockets)
AFADS	Automatic Force Adjustment Data System
AF	Adventures in Fantasy
AFAICR	As Far As I Can Recall
AFAICT	As Far As I Can Tell
AFAIK	As Far As I Know
AFAIR	As Far As I Recall
AF	Air Force
AFATDS	Advanced Field Artillery Tactical Data System
AF	Audio Frequency
AFB	Air Force Base
AFCAC	Air Force Computer Acquisition Center
AFC	American Football Conference
AFC	Automatic Frequency/Flight Control
AFC	Away From Computer
AFCC	Air Force Communications Command
AFGE	American Federation of Government Employees
AFI	Authority and Format Identifier
AFIPS	American Federation of Information Processing Societies
AFK	Away From Keyboard
AFL	American Federation of Labor
AFL	American Football League
AFLCIO	American Federation of Labor; Congress of Industrial Organizations, "AFL-CIO"
AFM	Adobe Font Metrics
AFNOR	Association Francaise de NORmalization
AFP	Appletalk Filing Protocol
AFS	Andrew File System
AFSC	Air Force Systems Command
AFSCME	American Federation of State, County and Municipal Employees
AFSK	Automatic Frequency Shift Keying
AFTRA	American Federation of Television and Radio Artists
AFUU	Association Francaise des Utilisateurs d'Unix
AG	Adjutant General
AG	Arcade Game
AG	Attorney General
AGCT	Army General Classification Test
AGL	Above Ground Level
AGM	Air-to-Ground Missile
AGN	Active Galactic Nucleus
AGU	American Geophysical Union
AHA	American Homebrew Association
AH	Artificial Horizon
AH	Avalon Hill (major war game manufacturer)
AHL	American Hockey League
AHQ	Air HeadQuarters
AIAA	American Institute of Aeronautics and Astronautics
AIA	American Institute of Architects
AIA	Application Integration Architecture
AI	Allegheny International
AI	Amnesty International
AI	Anal Intrusion
AI	Artificial Insemination
AI	Artificial Intelligence
AI	Attitude Indicator
AIC	Automatic Intercept Center
AICC	Automatic Intercept Communications Controller
AID	Agency for International Development
AIDDE	Ames' Interactive Dynamic Display Editor
AIDS	Acquired ImmunoDeficiency Syndrome
AIM	Air Interception Missile
AIM	Airman's Information Manual
AIMS	Advanced Inventory Management System
AIOD	Automatic Identification Outward Dialing
AIPS	Astronomical Image Processing System
AIS	Action Item System
AIS	Automatic Intercept System
AIUI	As I Understand It
AIX	Advanced Interactive eXecutive (unix)
AJ	Astronomical Journal
AKA	Also Known As
AK	Alaska
ALA	American Library Association
ALA	Automobile Legal Association
AL	Alabama
AL	American League (baseball)
ALAP	AppleTalk-LocalTalk Link Access Protocol
ALBM	Air-to-Land Ballistic Missile
ALBO	Automatic Line BuildOut
ALC	Automatic Load Control
ALEXIS	Array of Low Energy X-ray Imaging Sensors
ALFA	Anonima Lombarda Fabbrica Automobili
ALFE	Analog Line Front End
ALGOL	ALGorithmic Oriented Language
ALI	Automatic Location Indentification
ALIT	Automatic Line Insulation Testing
ALM	Asychronous Line Module
ALM	Asynchronous Line Multiplexer
ALMS	alt.lifestyle.master.slave
ALOL	Actually Laughing Out Loud
ALPO	Association of Lunar and Planetary Observers
ALRU	Automatic Line Record Update
ALS	Advanced Launch System [Space]
ALS	Automated List Service
ALU	Arithmetic Logic Unit
AMA	American Medical Association
AMA	Association for Model Aviation
AMA	Automatic Message Accounting
AMACS	Automatic Message Accounting Collection System
AM	Administrative Module
AM	Agricultural and Mechanical, "A&M"
AM	Air Marshal
AM	Alpes-Maritimes, "A.-M."
AM	American, "Am."
AM	Americium, "Am"
AM	Amplitude Modulation
AM	anno mundi (in the year of the world)
AM	Ante Meridiem, "a.m." (before noon)
AMARC	Automatic Message Accounting Recording Center
AMASE	Automatic Message Accounting Standard Entry
AMAT	Automatic Message Accounting Transmitter
AMATPS	Automatic Message Accounting TeleProcessing System
AMBA	Association of Master of Business Administration
AMC	Albany Medical College
AMD	Advanced Micro Devices [Corporate name]
AMERITECH	AMERican Information TECHnologies
AMEX	AMerican EXpress
AMI	American Micro System Inc
AMORC	Ancient Mystic Order Rosae Crucis
AMP	Adenosine MonoPhosphate
AMPAS	Academy of Motion Picture Arts and Sciences
AMPS	Advanced Mobile Phone Service
AMRAAM	Advanced Medium Range Air-To-Air Missile
AMROC	American Rocket Company [Space]
AMSAT	radio AMateur SATellite corp.
AMT	Active Memory Technology
AMU	Atomic Mass Unit
AMVET	AMerican VETeran
ANA	American Nurses Association
ANA	Automatic Number Announcement
ANAC	Automatic Number Announcement Circuit [telephony]
AN	Associated Number
ANC	All Number Calling [telephony]
ANC	American Network Communications
ANC	Army Nurse Corps
ANDF	Architecture-Neutral Distribution Format
ANF	Automatic Number Forwarding
ANFSCD	And Now For Something Completely Different
ANG	Air National Guard
ANI	Automatic Number Identification [telephony]
ANIF	Automatic Number Identification Failure
ANL	Argonne National Laboratory
ANOVA	ANalysis Of VAriance
ANPA	American Newspaper Publishers Association
ANSI	American National Standards Institute
ANU	Australian National University
ANZUS	Australia, New Zealand, United States
AOA	Abort Once Around (Shuttle abort plan)
AO	Account Of
AOCS	Attitude and Orbit Control System
AOL	Absent Over Leave (see AWOL)
AOPA	Aircraft Owners and Pilots Association
AOP	Annual Operating Plan
AOQ	Average Outgoing Quality
AOS	Academic Operating System
AOS	Alternate Operator Service [telephony]
AOSS	Auxilliary Operator Service System
AOW	Asia and Oceania Workshop
APA	All Points Addressable
AP	Access Point
AP	Accounts Payable, "A/P"
AP	Additional Premium
AP	Age Play
AP	All Points
AP	Application Process
AP	Associated Press
AP	Attached Processor
APB	All Points Bulletin
APC	AMARC Protocol Converter
APDA	Apple Programmers and Developers Association
APDU	Application Protocol Data Unit
APE	APplication Engineering
APG	Aberdeen Proving Ground
API	American Petroleum Institute
API	Application Program(ming) Interface
APICS	American Production and Inventory Control Society
APJ	Astrophysical Journal, "Ap.J", "ApJ"
APL	A Programming Language
APM	Attached Pressurized Module (a.k.a. Columbus)
APO	Alpha Pi (?) Omega, service fraternity
APO	Army Post Office
APP	Application Portability Profile
APPC	Advanced Peer-to-Peer Communications
APPC	Advanced Program-to-Program Communication (IBM)
APR	Annual Percentage Rate
APS	Automatic Protection Switch
APSE	Ada Programming Support Environment
APT	Attached Proton Test
APU	Auxiliary Power Unit
AQ	Accumulator-Quotient register
AQL	Acceptable Quality Level
AR	Accounts Receivable, "A/R"
AR	Address Register
AR	Alarm Report
ARAMIS	American Rheumatic Arthritis Medical Information System
AR	Arkansas
ARC	Advanced RISC Computing
ARC	American Red Cross
ARC	Ames Research Center (NASA)
ARC	Audio Response Controller
ARCNET	Attached Resource Computer local area NETwork
ARCO	Atlantic Richfield COmpany
ARIS	Audichron Recorded Information System
ARLL	Advanced Run-Length Limited encoding
ARM	Acorn Risc Machine
ARM	Adjustable Rate Mortgage
ARM	Annotated Reference Manual
ARO	After Receipt of Order
ARPA	Advanced Research Projects Agency (of the DoD, see DARPA)
ARP	Address Resolution Protocol (Internet->Ethernet)
ARPANET	Advanced Research Projects Agency NETwork
ARQ	Automatic Repeat reQuest
ARRL	Amateur Radio Relay League
ARSA	Airport Radar Service Area
ARS	Alternate Route Selection
ARSB	Automated Repair Service Bureau
ARTCC	Air Route Traffic Control Center
ARTEMIS	Advanced Relay TEchnology MISsion
ARU	Audio Response Unit
ARV	American Revised Version
ASA	Acetyl Salicylic Acid
ASA	American Standards Association (now ANSI)
ASA	Astronomical Society of the Atlantic
ASAIGAC	As Soon As I Get A Chance
AS	Anglo-Saxon
ASAP	As Soon As Possible
ASAT	As Simple As That
ASB	Alt.Sex.Bondage
ASC	Accredited Standards Committee
ASC	Additional Sense Code
ASCAP	American Society of Composers, Authors, and Publishers
ASCC	Automatic Sequence-Controlled Calculator
ASCII	American Standard Code for Information Interchange
ASCQ	Additional Sense Code Qualifier
ASDIC	Anti-Submarine Detection Investigation Committee (British for sonar)
ASDSP	Application-Specific Digital Signal Processor
ASF*	alt.sex.fetish.*
ASFD	alt.sex.femdom/ alt.sex.fetish.diapers
ASG	Automated Sciences Group
ASHRAE	Amer. Soc. of Heating, Refrigerating and Air-cond. Engineers, inc.
ASI	Agenzia Spaziale Italiano
ASI	Asynchronous SCSI Interface
ASI	Automatic System Installation
ASIC	Application Specific Integrated Circuit
ASIS	Aromatic Solvent Induced Shift
ASK	Akademische Software Kooperation
ASK	Amplitude Shift Keying
ASL	(a/s/l) Age, Sex, Location (usually impolite IRC query)
ASM	American Society of Metals
ASME	American Society of Mechanical Engineers
ASN1	Abstract Syntax Notation One, "ASN.1"
ASN	Abstract Syntax Notation
ASOC	Administrative Service Oversight Center
ASP	Aggregated Switch Procurement
ASP	Appletalk Session Protocol
ASPEN	Automatic System for Performance Evaluation of the Network
ASR	Airport Surveillance Radar
ASRM	Advanced Solid Rocket Motor
ASRS	Aviation Safety Reporting System
ASS	Alt.Sex.Spanking/Stories, depending on context
ASSR	Autonomous Soviet Socialist Republic
AST	Applied System Technology
AST	Asyncronous System Trap
AST	Atlantic Standard Time
ASTM	American Society of Testing and Materials
ASV	American Standard Version
ATA	Airport Traffic Area
ATA	AT Attachment
ATA	Automatic Trouble Analysis
ATACC	Advanced Tactical Air Command Central
AT	Access Tandem
AT	Advanced Technology
AT	Atlantic Time
ATB	Advanced Technology Bomber (stealth bomber)
ATB	All Trunks Busy
ATB	Alt.Talk.Bestiality
ATC	Air Traffic Control
ATC	Atsugi Technical Center
ATC	Automatic Transmission Control
ATDRS	Advanced Tracking and Data Relay Satellite
ATE	Automatic Test Equipment
ATEOTD	At The End of the Day
ATF	Advanced Technology Fighter
ATH	Abbreviated Trouble History
ATI	Automatic Test Inhibit
ATIS	Atherton Tools Interface Specification
ATIS	Automatic Terminal Information Service
ATIS	Automatic Transmitter Identification System
ATK	Andrew ToolKit
ATLAS	Atmospheric Laboratory for Applications and Science
ATM	Adobe Type Manager
ATM	Amateur Telescope Maker
ATM	Asynchronous Transfer Mode
ATM	At The Moment
ATM	Automatic Teller Machine
ATMS	Automated Trunk Measurement System
ATN	Automated Test Network
ATO	Abort To Orbit (Shuttle abort plan)
ATOMS	AT&t Optimized Materials Simulator
ATP2	AppleTalk Phase 2
ATP	Adenosine TriPhosphate
ATP	Airline Transport Pilot (highest grade of pilot certificate)
ATP	All Tests Pass
ATP	Appletalk Transaction Protocol
ATPCO	Airline Tariff Publishing COmpany
ATR	Alternate Trunk Routing
ATR	Apollo Token Ring
ATRS	Automated Trouble Reporting System
ATS	Automated Test System
ATSL	Along The Same Line
ATT	American Telephone & Telegraph, "AT&T"
ATTC	Automatic Transmission Test and Control circuit
ATTCOM	American Telephone & Telegraph COMmunications
ATTIS	American Telephone & Telegraph Information Systems
ATV	All Terrain Vehicle
AU	Arithematic Unit
AU	Astronomical Unit (93,000,000 miles) [Space]
AUDIX	AUDio Information eXchange
AUI	Attachment Unit Interface
AUP	Acceptable Use Policy
AURA	Association of Universities for Research in Astronomy
AUS	Army of the United States
AUTODIN	AUTOmatic DIgital Network
AUTOSEVCOM	AUTOmatic SEcure Voice COMmunications
AUTOVON	AUTOmatic VOice Network
AUX	Apple UniX
AUXF	AUXillary Frame
AV	AudioVisual
AVD	Alternate Voice Data
AVLIS	Atomic Vapor Laser Isotope Separation
AVS	Application Visualization Software
AWACS	Airborne Warnings And Control Systems
AWEA	American Wind Energy Association
AWG	American Wire Gauge
AWGTHTGTTA	Are We Going To Have To Go Through This Again
AWHFY	Are We Having Fun Yet
AWK	al Aho, peter Weinberger, brian Kernighan (pattern scanning language)
AWOL	Absent WithOut Leave (also Absent Without Official Leave) (see AOL)
AWST	Aviation Week and Space Technology (a.k.a. AvLeak), "AW&ST"
AXAF	Advanced X-ray Astrophysics Facility [Space]
AY	Arther Young
AZ	Arizona
B4	Before
B4N	Bye For Now
B6ZS	Bipolar with 6 Zero Subsitution
B911	Basic 911
BA	Bachelor of Arts
BAC	By Any Chance
BACH	Business Alliance for Commerce in Hemp
BAFO	Best And Final Offer
BAG(L)	Busting A Gut (Laughing)
BALUN	BALanced to UNbalanced
BAMAF	BELLCORE AMA Format
BANCS	Bell Administrative Network Communications System
BAPCO	Bellsouth Advertising & Publishing COmpany
BARRNET	Bay Area Regional Research Network, "BARRNet" (SF Bay Area)
BASH	Bourne-Again SHell
BASIC	Beginner's All-purpose Symbolic Instruction Code
BATSE	Burst And Transient Source Experiment (on GRO)
BBA	Bachelor of Business Administration
BB	Bases on Balls
BBB	Better Business Bureau
BB	Best of Breed
BB	Bunnies and Burrows
BBC	British Broadcasting Corporation
B	bit, "b"
BBIAB	Be Back In A Bit
BBL	Barrel
BBL	[I'll] Be Back Later
BBM	Big Beautiful Man
BBN	Bolt, Beranek, and Newman [Corporate name]
B	Book
BBS	Be Back Soon
BBS	Bulletin Board Service/System
BBW	Big Beautiful Woman
BBXRT	Broad-Band X-Ray Telescope (ASTRO package)
B	Byte
BC	Battlecars
BC	Before Christ
BC	British Columbia
BCBS	Blue Cross/Blue Shield, "BC/BS"
BCC	Blind/Blank Carbon Copy
BCC	Block Check Character
BCC	Blocked Call Cleared
BCD	Bad Conduct Discharge
BCD	Binary Coded Decimal
BCD	Blocked Call Delayed
BCDIC	Binary Coded Decimal Interchange Code
BCE	Before the Common Era (substitute for BC)
BCNU	Be Seeing You
BCP	Binary Communications Protocol
BCP	Byte Controlled Protocols
BCPL	Basic Combined Programming Language
BCR	Bell Communications Research
BCS	Bachelor of Commercial Science
BCS	Basic Combined Subset
BCS	Batch Change Supplement
BCS	Binary Compatibility Standard (ABI for Motorola chips)
BCS	Boston Computer Society
BCS	British Computer Society
BCWP	Budgeted Cost of Work Performed
BCWS	Budgeted Cost of Work Scheduled
BDA	Battle Damage Assessment
BDA	Bomb Damage Assessment
BD	Bachelor of Divinity
BD	Bank Draft
BD	Bills Discounted
B&D	Bondage and Discipline
BDC	Boston Development Center
BDD	Basic Dungeons & Dragons, "BD&D"
BDF	Binary Distribution Format
BDF	Bitmap Description Format (Adobe)
BDF	Bitmap Distribution Format
BDSM	Bondage & Discipline, Dominance & Submission, Sado-Masochism.
BDSMLMNOP	BDSM and whatever else we might do
BDT	Billing Data Transmitter
BDT	Bulk Data Transfer
BEA	Bureau of Economic Analysis
BEAV	Binary Editor And Viewer
BE	Back End
BE	Bill of Exchange
BECAUSE	BEnchmark of Concurrent Architectures for their Use in Scientific Engineering
BED	Hanscom Field, Bedford MA
BEF	Band Elimination Filter
BEF	British Expeditionary Force (see AEF)
BELLCORE	BELL COmmunications REsearch
BEM	Bug Eyed Monster
BENELUX	BElgium, NEtherlands, and LUXembourg
BER	Basic Encoding Rules
BER	Bit Error Rate
BERNET	BErliner RechnerNETz
BERT	Bit Error Rate Test
BEST	Borland Enhanced Support and Training
BETRS	Basic Exchange Telecommunications Radio Service
BFA	Bachelor of Fine Arts
BF	Boy Friend
BF	Brought Forward
BFD	Big F***ing Deal
BFHD	Big Fat Hairy Deal
BFN	Bye For Now
BFR	Biennial Flight Review
BGP	Border Gateway Protocol
BHA	Butylated HydroxyAnisole
BH	Black Hole
BH	Boot Hill
BHC	Busy Hour Calls
BHP	Brake HorsePower
BHT	Butylated HydroxyToluene
BIAB	Back In A Bit
BIAF	Back In A Few
BIAS	Back In A Second
BIAW	Back In A While
BI	Backplane Interconnect
BI	Bus Interconnect
BICS	Building Industry Consulting Services [telephony]
BID	Bis In Die (twice a day)
BIMA	Berkeley Illinois Maryland Array
BIND	Berkeley Internet Name Daemon
BIOC	Break Into Other Computers
BION	Believe It Or Not
BIOS	Basic Input Output System
BIRD	BIlinear Rotation Decoupling
BIS	Business Information System
BISDN	Broadband Integrated Services Digital Network, "B-ISDN"
BISP	Business Information System Program
BISYNC	Binary Synchronous Communications, "BiSync" (BSC is preferred) [IBM]
BIT	Binary digIT
BIT	Bipolar Integrated Technology Inc
BITNET	Because-It's-Time NETwork
BITS	Biotechnology Information Toolkit Software
BIU	Bus Interface Unit
BIX	Byte Information eXchange
BLAS	Basic Linear Algebra Subroutines
BLAST	BLocked ASynchronous Transmission
BL	Bill of Loading
BLDS	Busy Line/Don't Answer, "BL/DS"
BLER	Block Error Rate
BLERT	BLock Error Rate Test
BLF	Busy Lamp Field [telephony]
BLF	Busy Line Field
BLM	Bureau of Land Management
BLOBS	Binary Large OBjectS
BLS	Bureau of Labor Statistics
BLS	Business Listing Service
BLT	Bacon, Lettuce, and Tomato
BLT	BLock Transfer
BLV	Busy Line Verification
BMA	Bank Marketing Association
BM	Basal Metabolism
BM	Bowel Movement
BM	Breakdown Maintenance
BMEWS	Ballistic Missile Early Warning
BMG	Bloomington, IN
BMI	Broadcast Music Inc.
BMO	Ballistic Missile Office
BMOC	Big Man On Campus
BMP	Benchmark Plan
BMR	Basal Metabolism Rate
BNC	Bayonet Navy Connector
BNC	Bayonet Neill Concelman (connector) [electronics] (see also TNC)
BNC	Berkley Nucleonics Corporation
BNC	British Naval Connectors
BNET	Berkeley NETworking
BNF	Bachus-Naur Form
BNFL	British Nuclear Fuels Ltd
BNRCVUUCP	Batch News ReCeive Via UUCP
BNS	Billed Number Screening
BNSC	British National Space Centre
BNU	Basic Networking Utilities (AT&T's name for HoneyDanBer UUCP)
BO	Body Odor
BO	Branch Office
BO	Buyer's Option
BOC	Bell Operating Company
BOD	Board Of Directors
BOF	Birds Of a Feather
BOFH	Bastard Operator From Hell
BOM	Bill Of Materials
BOQ	Bachelor Officers' Quarters
BOR	Basic Output Report
BORSCHT	Battery, Overvoltage, Ringing, Supervision, Coding, Hybrid Test
BOS	Base Operating System
BOS	Boston MA
BOS	Business Office Supervisor
BOSIX	Biin Open System Interface eXtension
BOSS	Billing and Order Support System
BOT	Beginning Of Tape
BP	Base Pointer
BP	Blood Pressure
BP	British Petroleum
BP	British Pharmacopoeia
BPD	Borderline Personality Disorder
BPI	Bits Per Inch, Blocks Per Inch, Bytes Per Inch
BPOC	Bell Point Of Contact
BPOE	Benevolent and Protective Order of Elks
BPPS	Basing-Point Pricing System
BPS	Bits/Bytes Per Second
BPSS	Basic Packet-Switching Service
BRAT	Business Residence Account Tracking system
BRB	[I'll] Be Right Back
BR	Bills Receivable
BR	British Rail
BRC	Business Reply Card
BRCS	Business Residence Custom Service
BRI	Basic Rate Interface
BRIEF	Basic Reconfigurable Interactive Editing Facility
BRL	army Ballistic Research Laboratory
BRL	Ballistics Research Lab
BRM	Basic Remote Module
BRS	Bibliographic Retrieval Service
BRT	Be Right There
BSA	Basic Serving Arrangements
BSA	Birmingham Small Arms
BSA	Boy Scouts of America
BS	Bachelor of Science
BS	Back Space
BS	Banded Signaling
BSBH	Busy Season Busy Hour
BS	Bill of Sale
BS	Bill of Sale, "B/S"
BS	British Standards
BSC	Bachelor of SCience, "BSc"
BSC	Binary Synchronous Communication
BSC	Binary Synchronous Communications (also sometimes BiSync) [IBM]
BSC	Business Service Center
BSCM	BiSynchronous Communications Module
BSD	Berkeley Software Distribution
BSE	Basic Service Element
BSF	Bell Shock Force
BSI	British Standards Institute
BSMTP	Batched SMTP
BSN	Bachelor of Science in Nursing
BSOC	Bell Systems Operating Company
BSOD	Blue Screen Of Death
BSP	Bell System Practice
BSRFS	Bell System Reference Frequency Standard
BSS	Basic Synchronized Subset
BSS	Block Started by Symbol (IBM assembly-language)
BST	Basic Services Terminal
BST	Bangladesh Standard Time
BST	British Summer Time
BSTJ	Bell System Technical Journal
BSTS	Better Safe than sorry
BSW	Boston Software Works
BTA	But Then Again
BTAM	Basic Telecommunications Access Method [IBM]
BT	BitTorrent
BT	Bus Terminator
BTDT	Been There, Done That
BTHU	British Thermal Unit, "BThU" (BTU, q.v., is preferred)
BTL	Backplane Transceiver Logic
BTL	Bell Telephone Laboratories
BTN	Billing Telephone Number
BTO	Bachman Turner Overdrive
BTOL	Better Than Open Look
BTS	Board Tracking System
BTS	Bug Tracking System
BTSOOM	Beats The Shit Out Of Me
BTTH	butt to the head
BTU	British Thermal Unit
BTW	By The Way
BU	Bushido
BU	Business Units
BURP	Brewers United for Real Potables
BUS	Basic Utility System
BUT	Board Under Test
BVA	Billing Validation Application
BV	Blessed Virgin
BVC	Billing Validation Center
BVY	Beverly MA
BW	Business Wire
BWC	BandWidth Compression
BWG	Big Wide Grin
BWI	Baltimore-Washington International (airport)
BWI	British West Indies
BWM	Broadcast Warning Message
BWT	Broadcast Warning TWX
BWTS	BandWidth Test Set
BX	Base eXchange (see also PX)
BYKT(A)	But You Knew That (Already)
BYU	Brigham Young University
CAA	Civil Aviation Authority (U.K.)
CAB	Civil Aeronautics Board
CABS	Carrier Access Billing System
CA	CAble
CA	California
CAC	Calling-card Authorization Center
CAC	Carrier Access Code
CAC	Circuit Administration Center
CAC	Customer Administration Center
CA	Chartered Accountant
CA	Chief Accountant
CA	Chronological Age
CACM	Communications of the Association for Computing Machinery
CA	Collision Avoidance (as in CSMA/CA (q.v.))
CAD	Computer Aided Design (sometimes seen as CAD/CAM)
CAD	Computer-Aided Dispatch
CADD	Computer-Aided Design and Drafting
CADV	Combined Alternate Data/Voice
CAE	Common Application Environment
CAE	Computer-Aided Education
CAE	Computer-Aided Engineering
CAFE	Corporate Average Fuel Economy
CAGR	Compound Annual Growth Rate
CAI	Call Assembly Index
CAI	Computer Aided Instruction
CAI	Computer Application Inc
CAI	Computer Assisted Instruction
CAIS	Colocated Automatic Intercept System
CAIS	Common Apse Interface Specification
CALRS	Centralized Automatic Loop Reporting System
CALS	Computer-aided Acquisition and Logistics Support
CAMAC	Computer Automated Measurement And Control
CAMA	Centralized Automatic Message Accounting
CAM	Common Access Method (SCSI)
CAM	Computer Aided Management
CAM	Computer-Aided Manufacturing
CAM	Computer Aided Manufacturing (sometimes seen as CAD/CAM)
CAM	Content Addressable Memory
CAML	Categorical Abstract Machine Language
CAMM	Computer Assisted Material Management
CAMP	Campaign Against Marijuana Planting
CAMRA	CAMpaign for Real Ale
CAN	Campus Area Network
CAP	Civil Air Patrol
CAP	Columbia Appletalk Package
CAP	Computer Aided Publishing
CAPP	Computer Aided Process Planning
CAPS	CAPital letterS
CAPTAIN	Character And Pattern Telephone Access Information Network
CAR	Computer Access & Retrieval
CAR	Contents of the Address part of the Register
CAROT	Centralized Automatic Reporting On Trunks
CART	Championship Auto Racing Teams
CAS	Chemical Abstracts Service
CAS	Circuit Associated Signaling
CAS	Communicating Application Specification
CAS	Computerized Autodial System
CASE	Common Application Service Element
CASE	Computer Aided Software Engineering
CASSI	Chemical Abstracts Service Source Index
CASSIS	Classification and Search Support Information System
CAT	Computer-Aided Tomography
CAT	Computer Assisted Typesetter
CAT	conCATenate
CAT	Craft Access Terminal
CAT	Customer Acceptance Test
CATIS	Common Applications and Tools Integration Services
CATLAS	Centralized Automatic Trouble Locating and Analysis System
CATV	Community Antenna TeleVision
CAU	Connection Arrangement Unit
CAV	Constant Angular Velocity
CAVU	Ceiling And Visibility Unlimited
CB(C&B)	Chastity Belt / Cock and Ball
CBC	Canadian Broadcasting Corporation
CB	Citizens Band radio
CBD	Cash Before Delivery
CBD	Central Business District
CBD	Commerce Business Daily
CBDS	Connectionless Broadband Data Service
CBEMA	Computer & Business Equipment Manufacturers Association
CBI	Computer Based Instruction
CBR	Chemical, Biological, Radiological warfare
CBS	Columbia Broadcasting System
CBS	CrossBar Switching
CBT	Cock and Ball Torture/Training
CBW	Chemical and Biological Warfare
CBX	Computerized Branch eXchange
CCA	Computer Corporation of America [Corporate name]
CCAFS	Cape Canaveral Air Force Station
CC	Carbon Copy
CCC	Canadian Committee on Cataloging
CCC	Central Control Complex
CCC	Ceramic Chip Carriers
CCC	Civil(ian) Conservation Corps
CCCCM	CCC CounterMeasures (sometimes C^3CM)
CCC	Command, Control, and Communications (sometimes C^3)
CC	C Compiler
CCC	Computer Control Center
CCC	Concourse Computer Center [MIT]
CCC	Customer Call Center
CC	Center Conductor
CC	Central Control
CCCI	Command, Control, Communications, and Intelligence
CC	Cluster Controller
CC	Common Control
CC	Cost Center
CC	Country Code
CCD	Charge Coupled Device (see CID)
CCD	Computer-Controlled Display
CCDS	Centers for the Commercial Development of Space
CCH	Connections per Circuit per Hour
CCI	Computer Carrier Interrupt
CCI	Computer Consoles, Incorporated
CCIM	Certified Commercial Investment Member
CCIP	Continuously Computed Impact Point
CCIR	Comite' Consultatif International des Radio Communications
CCIS	Common Channel Interoffice Signaling [telephony]
CCITT	Comite' Consultatif International Telegraphique et Telephonique
CCITT	International Consultative Committee for Telegraphy and Telephony
CCL	Console Command Language
CCNC	Common Channel Network Controller
CCNC	Computer/Communications Network Center
C	Copper
CCR	Commitment, Concurrency, and Recovery
CCR	Covenants, Conditions, and Restrictions
CCR	Creedence Clearwater Revival
CCR	Customer-Controlled Reconfiguration
CCRP	Continuously Computed Release Point
CCSA	Common Control Switching Arrangement [telephony]
CCS	Common Channel Signaling
CCS	Common Command Set (SCSI)
CCS	Hundred (C) Call Seconds
CCTAC	Computer Communications Trouble Analysis Center
CCTA	Central Computer and Telecommunications Agency
CCT	Central Control Terminal
CCTV	Closed Circuit TeleVision
CCU	COLT Computer Unit
CCV	Calling Card Validation
CCW	Counter ClockWise
CDA	Call Data Accumulator
CDA	Coin Detection and Announcement
CDA	Compound Documents Architecture
CDAR	Customer Dialed Account Recording
CDB	Command Descriptor Block
CDB	Customer Distributed Buglist
CD	Carrier Detect (properly DCD (q.v.))
CDC	Centers for Disease Control
CDC	Control Data Corporation, inc. [Corporate name]
CD	Certificate of Deposit
CDCF	Cumulative Discounted Cash Flow
CD	Circular Dichroism
CD	Civil Defense
CD	Collision Detection (as in CSMA/CD (q.v.))
CD	Compact Disk
CD	Cross Dresser
CDEV	Control panel DEVice
CDF	Combined Distributing Frame
CDF	Context-Dependent File
CDIAC	Carbon Dioxide Information Analysis Center
CDI	Circle Digit Identification
CDI	Course Deviation Indicator
CDO	Community Dial Office
CDP	Career Development Program
CDPR	Customer Dial Pulse Receiver
CDR	Call Dial Rerouting
CDR	CommanDeR
CDR	Contents of the Decrement part of the Register
CDR	Critical Design Review
CDROM	Compact Disk Read Only Memory, "CD-ROM"
CDS	Craft Dispatch System
CDSF	Commercially Developed Space Facility
CDT	Call Data Transmitter
CDT	Central Daylight Time
CDU	Control Display Unit
CEA	Commissariat a l'Energie Atomique, France
CEA	Council of Economic Advisors
CEA	County Education Authority
CEBIT	welt-CEntrum Buero Information Telekommunikation
CEC	Commission of the European Communities
CE	Chemical Engineer
CE	Civil Engineer
CE	Common Era (substitute for AD)
CE	Corps of Engineers
CE	Customer Engineer
CED	Committee for Economic Development
CEERT	Coalition for Energy Efficiency and Renewable Technologies
CEF	Cable Entrance Facility
CEI	Comparably Efficient Interconnection
CELSS	Controlled Ecological Life Support System [Space]
CEN	Centre d'Etudes Nucleaires
CENS	Centre d'Etudes Nucleaires de Seclay
CENTO	CENtral Treaty Organization
CEO	Chief Executive Officer
CERMET	Ceramic Metal Element
CERN	organisation (formerly Conseil) Europeenne pour la Recherche Nucleaire
CERT	Computer Emergency Response Team
CEST	Central European Summer Time
CET	Central European Time
CEV	Controlled Environment Vault
CEVI	Common Equipment Voltage Indicator
CFA	Center For Astrophysics
CFB	Color Frame Buffer
CFCA	Communications Fraud Control Association
CF	Carry Forward
CFC	Chloro-FluoroCarbon [chemical]
CFC	Combined Federal Campaign
CF	Coin First payphone [telephony]
CFD	Computational Fluid Dynamics
CFF	Columbus Free Flyer
CFHT	Canada-France-Hawaii Telescope
CFI	Certificated Flight Instructor
CFI	Cost, Freight, and Insurance
CFIDS	Chronic Fatigue Immune Deficiency Syndrome
CFL	Canadian Football League
CFO	Chief Financial Officer
CFP	Call For Papers
CFR	Code of Federal Regulations
CFS	Chronic Fatigue Syndrome
CGA	Color Graphics Adapter
CG	Coast Guard
CG	Commanding General
CGCT	Compagnie Generale de Constructions Telephoniques
CGE	Cincinnati Gas & Electric, "CG&E"
CGE	Compagnie Generale d'Electricite
CGIAR	Consultative Group on International Agricultural Research
CGI	Computer Graphics Interface
CGM	Computer Graphics Metafile
CGMIF	Computer Graphics Metafile Interchange Format
CGN	Concentrator Group Number
CGS	Centimeter-Gram-Second
CGX	Chicago (Meigs) IL
CHA	Champions
CHAP	CHAnnel Processor
CHARA	Center for High Angular Resolution Astronomy
CHARGEN	CHARacter GENerator
CH	Cardboard Heroes
CH	ClearingHouse
CH	CourtHouse
CH	Customs House
CHI	Chill:  Adventures into the Unknown
CHOTS	Corporate Headquarters Office Technology System
CHP	California Highway Patrol
CHUDWAH	Clueless Het Dom Wannabe
CHUSWAH	Clueless Het Sub Wannabe
CIAC	Computer Incident Advisory Capability
CIA	Central Intelligence Agency [US Government]
CIB	Console Interface Board
CICA	Competition in Contracting Act
CIC	Carrier Identification Code
CIC	Coordination and Information Center [CSNet]
CI	Configuration Interaction
CICS	Customer Information Control System [IBM]
CICSVS	Customer Information Control System / Virtual Storage, "CICS/VS"
CI	Cubic Inches
CID	Central Institute for the Deaf
CID	Charge Injection Device (see CCD)
CID	Computer Integrated Design
CIDEP	Chemically Induced Dynamic Electron Polarization
CIDIN	Common Icao Data Interchange Network
CIDNP	Chemically Induced Dynamic Nuclear Polarization
CIF	Caltech Intermediate Form
CIF	Cost, Insurance and Freight
CII	Call Identity Index
CIMA	Construction Industry Manufacture's Association
CIM	Computer Integrated Manufacturing
CIO	Chief Information Officer
CIP	Chief Income Producer
CIP	Computer-Investitions-Programm
CIRCA	Center for Instructional and Research Computing Activities
CIRRIS	Cryogenic InfraRed Radiance Instrument for Shuttle
CISC	Complex Instruction Set Computer
CIS	Chief Income Spender
CIS	Commonwealth of Independent States
CIS	Complete and Irrevocable Submission
CIS	Compuserve Information S?
CIS	Customized Intercept Service
CIT	California Institute of Technology
CIT	Case Institute of Technology (part of CWRU, Cleveland, OH)
CIT	Circumstellar Imaging Telescope [Space]
CIT	Computer Integrated Telephony
CIU	Computer Interface Unit
CLASP	Comprehensive Logistics Automated Support Program
CLASS	Centralized Local Area Selective Signaling
CLASS	Custom Local Area Signaling Service
CL	Connection-Less mode
CLDN	Calling Line Directory Number
CLEF	Certified Licensed Evaluation Facility
CLEI	Common-Language Equipment Identification
CLI	Calling Line Ident
CLI	Command Line Interpreter
CLID	Calling Line IDentification
CLLI	Common-Language Location Identification
CLNP	ConnectionLess Network Protocol
CLOS	Common Lisp Object System
CLRC	Circuit Layout Record Card
CLR	Combined Line and Recording
CLS	ConnectionLess Server
CLTP	ConnectionLess Transport Protocol
CLU	Chartered Life Underwriter
CLUT	Color LookUp Table
CLV	Constant Linear Velocity
CMA	Cash Management Account
CMAC	Centralized Maintenance and Administration Center
CMCC	Central Mission Control Centre (ESA)
CMC	Communication Machinery Corporation
CMC	Construction Maintenance Center
CMC	Corporate Management Commitee
CM	Command Module (Apollo spacecraft)
CM	Computer Modern
CM	Congregation of the Mission
CM	Corrective Maintenance
CMD	Centralized Message Distribution
CMDF	Combined Main Distributing Frame
CMDS	Centralized Message Data System
CMH	Port Columbus OH
CMI	Champaign-Urbana IL
CMIIW	Correct Me If I'm Wrong
CMIP	Common Management Information Protocol
CMIS	Common Management Information Service
CMISE	Common Management Information Service Element
CML	Current Model Logic
CMMU	Cache/Memory Management Unit
CMOS	Complementary-symmetry Metal-Oxide Semiconductor
CMOT	Common Management Information Services and Protocol over TCP/IP
CMRR	Common Mode Rejection Ratio
CMS	Call Management System
CMS	Circuit Maintenance System
CMS	Communications Management Subsystem
CMS	Content Management System
CMS	Conversational Monitoring System
CMSGT	Chief Master Sergeant, "CMSgt"
CMT	Cellular Mobile Telephone
CMU	Carnegie-Mellon University
CMU	COLT Measurement Unit
CMW	Compartmented Mode Workstation
CMYK	Cyan, Magenta, Yellow, blacK
CNAB	Customer Name/Address Bureau
CNA	Communications Network Application
CNA	Customer Name / Address, "CN/A" [telephony]
CNA	Customer Name and Address
CN	Canadian National (railroad) [Corporate name]
CNCC	Customer Network Control Center
CNC	Computer Numerical Control
CNC	Consensual Non Consent
CN	Change Notice
CNDO	Complete Neglect of Differential Overlap
CNES	Centre National d'Etude Spatiales
CNI	Common Network Interface
CNMA	Communications Network for Manufacturing Applications
CNM	Communications Network Management
CNMS	Cylink Network Management System
CNN	Cable News Network
CNO	Carbon-Nitrogen-Oxygen
CNO	Chief of Naval Operations
CNP	continued [in my] next post
CNR	Canadian National Railways
CNR	Carrier to Noise Ratio
CNR	Consiglio Nazionale delle Ricerche, Italy
CNRCVUUCP	Compressed News ReCeive Via UUCP
CNS	Central Nervous System
CNS	Complimentary Network Service
CNSR	Comet Nucleus Sample Return
COAM	Customer Owned And Maintained
COB	Close Of Business
COBE	COsmic Background Explorer
COBOL	COmmon Business Oriented Language
CO	Cash Order
COC	Call of Cthulhu
COC	Circuit Order Control
CO	Central Office [telephony]
CO	Colorado
COCOM	Coordinating Comittee for Export to Comminist Area
CO	Commanding Officer
CO	Conscientious Objector
COCOT	Customer-Owned Coin-Operated Telephone [telephony]
CODASYL	Conference On DAta SYstems Languages
CODCF	Central Office Data Connecting Facility
COD	Collect On Delivery; Cash On Delivery
CODEC	COder-DECoder
COE	Center Of Excellence
COE	Central Office Equipment
COEES	COE Engineering System
COER	Central Office Equipment Report
COFF	Common Object File Format
CO	in Care Of, "C/O"
COLA	Cost-Of-Living Allowance
COLOC	COrrelation spectroscopy for LOng-range Couplings
COLT	Central Office Line Tester
COMAS	Central Office Maintenance and Administration System
COM	Commercial (pilot certificate)
COM	Computer Output Microfilm
COMDEX	COMputer Dealer's Exposition
COMM	Communications
COMPACT	COMmercial Product ACquisition Team
COMPTEL	COMPton TELescope (on GRO)
COMSAT	Communications Satellite Corp
COMSAT	COMmunications SATellite [Space]
COMS	Complementary Metal Oxide Semiconductor
CONN	CONNector
CONS	Connection-Oriented Networking Session
CONTAC	Central Office NeTwork ACcess
CONUS	CONtinental United States
COO	Chief Operating Officer
COP	Character-Oriented Protocol
COPS	Computer Oracle and Password System
COQ	Cost Of Quality
CORE	COntrolled Requirement Expression
CORN	COmputer Resource Nucleus
CORNET	CORperate NETwork
COS	Central Office Switch
COS	Corporation for Open Systems
COSINE	Cooperation for Open Systems Interconnection Networking in Europe
COSMIC	COmmon Systems Main InterConnection frame system
COSMIC	COmputer Software Management and Information Center
COSMOS	COmputer System for Mainframe OperationS
COSTAR	Corrective Optics Space Telescope Axial Replacement
COSY	COrrelation SpectroscopY
COT	Central Office Terminal
COTS	Connection-Oriented Transport (layer) Service
CPA	Certified Public Accountant
CPA	Communications & Public Affairs, "C&PA"
CP	Canadian Pacific
CP	Canadian Press
CPC	Cellular Phone Company
CPC	Circuit Provisioning Center
CP	Chemically Pure
CP	Command Post
CP	Command Processor
CP	Control Program
CP	CoPy
CP	Corporal Punishment
CP	Cross Polarization
CPD	Central Pulse Distributor
CPE	Customer Premises Equipment
CPE	Customer-Provided Equipment
CPFF	Cost Plus Fixed Fee
CPH	Cost Per Hour
CPI	Characters Per Inch
CPI	Common Programming Interface
CPI	Computer Private branch exchange Interface
CPIO	CoPy In/Out
CPL	Combined Programming Language
CPMAS	Cross Polarization/Magic Angle Spinning, "CP/MAS"
CPM	Control Program for Microcomputers (sometimes CP/M)
CPM	Cost Per Minute
CPM	Critical Path Method
CPMG	Carr-Purcell-Meiboom-Gill
CPMP	Carrier Performance Measurement Plan
CPO	Chief Petty Officer
CPO	Chief Post Office
CPO	Customer Premises Equipment
CPP	Cable Patch Panel
CPR	Canadian Pacific Railway
C	programming language, successor to BCPL
CPS	Characters Per Second
CPSR	Computer Professionals for Social Responsibility
CPT	CaPTain
CPU	Central Processing Unit
CPW	Certified Public Weigher
CQ	Charge of Quarters, Call to Quarter
CQ	Commercial Quality
CRAF	Comet Rendezvous/Asteroid Flyby [Space]
CRAM	Card Random Access Memory
CRAS	Cable Repair Administrative System
CRB	Certified Residential Broker
CR	Carriage Return (ASCII 15 octal)
CRC	Camera Ready Copy
CRC	Chemical Rubber Company
CRC	Civil Rights Commission
CRC	Customer Record Center
CRC	Cyclical Redundancy Character
CRC	Cyclic Redundancy Check
CRD	Customer Required Date
CREG	Concentrated Range Extension with Gain
CREN	Corporation for Research and Educational Networking
CRFC	Customer Return For Credit
CRFMP	Cable Repair Force Management Plan
CRI	Cray Research, Inc.
CRIN	Centre de Recherche en Informatique de Nancy
CRISC	Complex-Reduced Instruction Set Computer
CRIS	Customer Record Information System
CRISP	Complex-Reduced Instruction Set Processor
CRISP	Cross-Relaxation Intensity Sequence Pattern
CRL	Certificate Revocation List
CRLF	Carriage Return/Line Feed
CRONIC	Colorado Rudimentary Operating Nucleus for Intelligent Controllers (HSC OS)
CROTCH	Computerized Routine for Observing and Testing the Channel Hardware
CRRES	Combined Release / Radiation Effects Satellite
CRSAB	Centralized Repair Service Answering Bureau
CRS	Centralized Results System
CRT	Cathode Ray Tube (also generic reference to a terminal)
CRTC	Canadian Radio-television and Telecommunications Commission
CSAB	Computing Sciences Accreditation Board
CSA	Canadian Standards Association
CSA	Carrier Serving Area
CSACC	Customer Service Administration Control Center
CSA	Client Service Agent
CSA	Confederate States of America
CSACS	Centralized Status, Alarm and Control System
CSA	Customer Service Administration
CSAR	Centralized System for Analysis Reporting
CSC	Cell Site Controller
CSC	Computer Sciences Corporation
CS	Chivalry & Sorcery, "C&S"
CS	Civil Servant
CSCM	Chemical Shift Correlation Map
CS	Code Segment
CS	Computer Science; Computing Science
CS	County Seat
CS	Customer Service
CSDC	Circuit Switched Digital Capability
CSD	Customer Service Division
CSE	Common Subexpression Elimination
CSF	Critical Success Factor
CSI	Commercial Systems Integration
CSIRO	Commonwealth Scientific and Industrial Research Organization
CSIS	Canadian Security and Intelligence Service
CSL	Can't Stop Laughing
CSL	Coin Supervising Link
CSMACA	Carrier Sense Multiple Access with Collision Avoidance, "CSMA/CA"
CSMA	Carrier Sense Multiple Access
CSMACD	Carrier Sense Multiple Access with Collision Detection, "CSMA/CD"
CSM	Command and Service Module (Apollo spacecraft)
CSM	Command Sergeant Major
CSN	Computer Systems News (magazine)
CSNET	Computer Science NETwork
CSOC	Consolidated Space Operations Center (at Colorado Springs)
CSO	Central Services Organization
CSO	Computing Services Office (UIUC)
CSPAN	Cable-Satellite Public Affairs Network, "C-SPAN"
CSP	Control Switching Point
CSR	Control and Status Register
CSRG	Computer Systems Research Group
CSRI	Computer Systems Research Institute (U Toronto)
CSRS	Civil Service Retirement System
CSS	Computer Sub-System
CSS	Customer Switching System
CSTA	Computer Supported Telecommunications Applications
CSTC	Consolidated Satellite Test Center (USAF)
CST	Central Standard Time
CSU	Channel Service Unit
CTC	Canadian Transport Commission
CTC	Centralized Traffic Control [railroad]
CTC	Central Test Center
CTC	Chu-Itoh Techno-Science Co.
CT	Central Time
CT	Charge Transfer
CT	Communications & Tracking, "C&T"
CT	Computed Tomography
CT	Connecticut
CTD	Computing and Telecommunications Division
CTERM	Command TERMinal (DECNET)
CTFO	Chill The Fuck Out
CTIO	Cerro Tololo Inter-american Observatory
CTM	Contac Trunk Module
CTMS	Carrier Transmission Measuring System
CTNE	Compania Telefonica Nacional de Espana
CTO	Call Transfer Outside
CTRL	Control
CTS	Carpal Tunnel Syndrome
CTS	Cartridge Tape Subsystem (Exabyte)
CTS	Clear To Send
CTS	Compatible Timesharing System
CTSS	{Compatible,Chameleon,Cray,Cyber} Time-Sharing System
CTT	Cartridge Tape Transport
CTTC	Cartridge Tape Transport Controller
CTTN	Cable Trunk Ticket Number
CTV	Canadian TeleVision network
CUA	Common User Access
CU	Close-Up
CU	Control Unit
CUCRIT	Capital Utilization CRITeria
CU	Customer Unit
CU	(L8R) (S) See You (Later) (Soon)
CUL	See You Later [net jargon]
CUNBATCH	Compressed news UNBATCH
CUTK	Common Update/EQuipment system, "CU/TK"
CVCC	Controlled Vortex Combustion Chamber
CV	Constant Velocity
CV	Curriculum Vitae
CVD	Chemical Vapor Deposition
CVR	Compass Voice Response
CVT	Continuous Variable Transmission
CW	Car Wars
CWC	City-Wide Centrex
CW	Chemical Warfare
CW	Child Welfare
CW	Churchwarden
CW	Continuous Wave
CWI	Centrum voor Wiskunde en Informatica (Centre for Mathematics and Computer Science)
CWO	Cash With Order
CWO	Chief Warrant Officer
CWOT	Complete Waste Of Time
CWRU	Case Western Reserve University
CWYS	Converse With You Soon
CXI	Common X-windows Interface
CYA	Cover Your Ass
CY	Calendar Year
CYO	Catholic Youth Organization
CZ	Canal Zone
CZ	Control Zone
DACCS	Digital Access Cross Connect System [telephony]
DAC	Design Automation Conference
DAC	Digital to Analog Converter
DACS	Digital Access Cross-connect System [telephony]
DACS	Directory Assistance Charging System
DA	Days after Acceptance
DAD	Draft ADdendum
DA	Department of Agriculture
DA	Deposit Account
DA	Desk Accessory (Mac)
DA	Digital to Analog converter, "D?A"
DA	Directory Assistance (/C = computerized, /M = Microfilm)
DA	District Attorney
DA	Don't Answer
DAIS	Distributed Automatic Intercept System
DAMQAM	Dynamically Adaptive Multicarrier Quadrature Amplitude Modulation
DAP	Data Access Protocol (DECNET)
DAP	Division Advisory Panel [of NSF (q.v.) DNCRI (q.v.)]
DARC	Division Alarm Recording Center
DAR	Daughters of the American Revolution
DARFC	Duck And Run For Cover
DARPA	Defense Advanced Research Projects Agency
DARU	Distributed automatic intercept system Audio Response Unit
DASD	Direct Access Storage Device
DAS	Directory Assistance System
DAS	Distributor And Scanner
DAS	Dual Attach Station
DASWDT	Distributor And Scanner-Watch Dog Timer, "DAS-WDT"
DATA	Defense Air Transport Administration
DAT	Digital Audio Tape
DAV	Data Above Voice
DAV	Disabled American Veterans
DAY	Dayton OH
DBAC	Data Base Administration Center
DBA	Data Base Administrator
DBA	Doing Business As
DBAS	Data Base Administration System
DB	DataBase
DB	DeciBels, "db"
DB	Dial Box
DBF	DBase Format
DBM	DataBase Manager
DBME	DataBase Managment Environment
DBMS	DataBase Management System (rdbms for Relational)
DBRAD	Data Base Relational Application Directory
DBS	Duplex Bus Selector
DBT	Dialectical Behavior Therapy
DCA	Defense Communications Agency
DCA	Distributed Communication Architecture
DCA	Document Content Architecture
DCA	Washington (National) DC
DCC	Data Country Code
DCC	Descriptive Cataloging Committee
DCC	DiCyclohexylCarbodiimide
DCC	Digital Compact Cassette
DCCO	Defense Commercial Communications Office
DCCS	DisContiguous Shared Segments
DC	Data Cartridge
DCD	Data Carrier Detect (sometimes CD (q.v.))
DC	Direct Current, "dc" (see also AC)
DC	District of Columbia
DCE	Data Circuit-terminating Equipment
DCE	Data Communications Equipment
DCE	Distributed Computing Environment
DCH	D Channel Handler
DCI	Desktop Color Imaging
DCL	Data Control Language
DCL	DEC Control Language
DCL	Digital Command Language
DCLU	Digital Carrier Line Uint
DCM	Digital Carrier Module
DCMS	Distributed Call Measurement System
DCMU	Digital Concentrator Measurement Unit
DCNA	Data Communication Network Architecture
DCO	Document Change Order
DCP	Distributed Communications Processor
DCP	Duplex Central Processor
DCPR	Detailed Contuing Property Record (PICS/DCPR)
DCPSK	Differential Coherent Phase-Shift Keying
DCS	Digital Crosconnect System
DCS	Distribution Control System
DCT	Digital Carrier Trunk
DCTN	Defense Commercial Telecommunications Network
DCTS	Dimension Custom Telephone Service
DDA	Digital Differential Analyzer
DDA	Domain Defined Attribute
DDB	Device Dependent Bitmap
DDC	Digital Data Converter
DDC	Direct Department Calling
DDCMP	Digital Data Communication Message Protocol
DDCU	DC-to-DC Converter Unit
DD	Daredevils
DD	Data Dictionary
DD	Days after Date
DDD	Direct Distance Dialing [Telephony; principally US, elsewhere STD]
DD	Demand Draft
DD	Dishonorable Discharge
DD	Disk Drive
DD	Doctor of Divinity
DD	Double Density
DD	Dungeons & Dragons, "D&D"
DDE	Dynamic Data Exchange
D	Depth
DDJ	Dr. Dobbs Journal
DDK	Driver Development Kit (from MS)
DDL	Data Definition Language
DDL	Document Description Language
DDN	Defense Data Network
DDP	Datagram Delivery Protocol
DDP	Distributed Data Processing
DDPEX	Device Dependent PEX
DDQ	DichloroDicyanobenzoQuinone
DDS	Dataphone Digital Service [AT&T]
DDS	Dataphone Digital service  carrier offering 2.4 - 56 kb/s
DDS	Digital Dataphone Service
DDS	Digital Data Service
DDS	Digital Data Storage (Sony and HP's DAT format)
DDS	Digital Data System
DDS	Direct Digital Service
DDS	Doctor of Dental Surgery; Doctor of Dental Science
DDS	Document Distribution Services
DDT	DichloroDiphenylTrichloroethane
DDT	Don't Do That
DDV	DatenDirektVerbindung
DDX	Digital Data eXchange, Device Dependent X (windows)
DDX	Distributed Data eXchange
DEA	Data Encryption Algorithm
DEA	Drug Enforcement Agency
DEAR	Department of Energy Acquisition Regulation
DEBNA	Digital Ethernet BI Network Adapter
DEC	Digital Equipment Corporation [Corporate name]
DECNET	Digital Equipment Corporation NETwork
DECUS	Digital Equipment Computer Users Society
DE	Delaware
DE	Disk Enclosure
DELNI	Digital Ethernet Local Network Interconnect
DELQA	Digital Ethernet Lowpower Q-bus network Adapter
DELUA	Digital Ethernet Lowpower Unibus network Adapter
DEMPR	Digital Ethernet Multi-Port Repeater
DEPCA	Digital Ethernet Personal Computer-bus Adapter
DEPT	Distortionless Enhancement by Polarization Transfer
DEQNA	Digital Ethernet Q-bus Network Adapter
DEREP	Digital Ethernet REPeater
DERP	Defective Equipment Replacement Program
DES	Data Encryption Standard
DESPR	Digital Ethernet Single Port Repeater
DESTA	Digital Ethernet thin-wire STation Adapter
DEUNA	Digital Ethernet Unibus Network Adapter
DEW	Distant Early Warning (as in DEW Line)
DEXEC	Diagnostic EXEc software
DFC	Distinguished Flying Cross
DF	Damage Free
DFD	Data Flow Diagram
DF	Direction Finding
DF	Direction Finding, "D/F"
DFE	Data Flow Editor
DFG	Deutsche ForschungsGemeinschaft
DFI	Digital Facility Interface
DFM	Distinguished Flying Medal
DFMS	Digital Facility Management System
DFN	Deutsches ForschungsNetz
DFRF	Dryden Flight Research Facility (now ADFRF)
DFS	Depth-First Search
DFS	Distributed File System
DFT	Discrete Fourier Transform
DFTT	Don't Feed The Trolls
DFW	Dallas-Ft.Worth (regional airport)
DGA	Direct Graphics Access
DG	Data General [Corporate name]
DG	Dei Gratia (by the grace of God)
DG	Directional Gyro
DG	Director General
DGP	Dissimilar Gateway Protocol
DGSC	Defense General Supply Center
DHCP	Dynamic Host Configuration Protocol
DHHS	Department of Health and Human Services
DHSS	british Department of Health and Social Security
DHSS	Department of Health and Social Security (British)
DIA	Defence Intelligence Agency
DIA	Display Industry Association
DIAD	(magnetic) Drum Information Assembler / Dispatcher
DIA	Document Interchange Architecture
DIAL	Direct Information Access Line
DIAS	Defense Automatic Integrated System
DIBAL	DiIsoButylALuminum hydride
DIB	Device Independent Bitmap
DIB	Directory Information Bases
DIC	Digital Interface Controller
DID	Direct Inward Dialing [telephony]
DID	Dissociative Identity Disorder (used to be MPD)
DIE	Duplication Is Evil
DIF	Digital Interface Frame
DIF	Document Interchange Format
DIFMOS	Double Injection Floating Gate MOS
DIL	Dual InLine
DILOG	DIstributed LOGic
DIM	Data In the Middle
DIMS	Document Image Management System
DIN	Deutsche Industrie Normenausschuss
DIN	Deutsches Institut fur Normung
DINK	Double Income, No Kids
DIP	Dual Inline Package
DIR	Deliverly & Installation Request
DIRE	Dire Is Really Emacs
DIRT	Design In Real-Time
DISA	Direct Inward System Access
DISCO	DIfferences and Sums within COsy
DIS	Draft International Standard (ISO)
DISOSS	DIStributed Office Support System
DIU	Digital Interface Unit
DIV	Division
DIX	DEC, Intel, Xerox (Ethernet hardware levels)
DIY	Do It Yourself
DJ	Disc Jockey
DKF	Dreaded Koosh Flogger
DLA	Defense Logistics Agency
DLC	Data Link Control
DLC	Digital Loop Carrier
DLC	Driver's License Compact (Uniform interstate treatment)
DLCU	Digital Line Carrier Unit
DL	Download
DLE	Data Link Escape
DLG	Digital Line Graph
DLI	Data Link Interface
DLL	Dial Long Lines
DLL	Dynamic Link Library
DLO	Dead Letter Office
DLS	Data Link Control
DLS	Digital Link Service
DLTDHYITAOYWO	Dont Let The Door Hit You In The Ass On Your Way Out
DLTU	Digital Line/Trunk Unit
DLUPG	Digital Line Unit-Pair Gain, "DLU-PG"
DMA	Direct Memory Access
DMD	Directory Management Domain
DMD	Doctor of Dental Medicine
DM	Delta Modulation
DM	Dialog Manager
DM	District Manager
DM	Dungeon Master
DME	DiMethoxyEthane
DME	Distance Measuring Equipment
DME	Distributed Management Environment
DMF	DiMethylFormamide
DMI	Digital Multiplexed Interface
DML	Data Manipulation Language
DML	Data Manipulation Logic
DMOS	Diffusion Metal Oxide Semiconductor (see MOS)
DMQ	Do-Me Queen
DMS	Data Management System
DMS	Digital Multiplexed System
DMS	Diskless Management Services
DMSP	Defense Meteorological Satellite Program
DMU	Data Manipulation Unit
DMV	Department of Motor Vehicles
DMZ	DeMilitarized Zone
DNA	DeoxyriboNucleic Acid
DNA	Digital Network Architecture [DEC]
DNC	Direct Numerical Control
DNC	Dynamic Network Controller
DNCRI	[NSF (q.v.)] Division of Networking and Communications Research and Infrastructure
DN	Directory Number
DND	Do Not Disturb
DNDC	Don't Know, Don't Care
DNHR	Dynamic NonHierarchical Routing
DNIC	Data Network Identification Code [telephony]
DNI	DECnet Network Interface
DNL	Director of Naval Laboratories
DNP	Dynamic Nuclear Polarization
DNR	Dialed Number Recorder [telephony]
DNS	Domain Name System
DNX	Dynamic Network X-connect
DOA	Dead On Arrival
DOB	Date Of Birth
DOC	Dynamic Overload Control
DOCS	Display Operator Console System
DOD	Department of Defense, "DoD"
DOD	Department Of Defense [U.S. Government]
DOE	Department Of Energy [U.S. Government]
DOE	Depends On Experience
DOHC	Dual OverHead Camshaft
DOJ	Department Of Justice [U.S. Government]
DOMAIN	Distributed Operating Multi Access Interactive Network (Apollo)
DOM	Data On Master group
DORE	Dynamic Object Rendering Environment
DOS	Disk Operating System
DOT	Department Of Transportation [U.S. Government]
DOTE	Director, Operational Test and Evaluation, "DOT&E"
DOTS	Digital Office Timing Supply
DOV	Data Over Voice [telephony]
DOW	Day Of Week
DOXYL	Dimethyl-OXazolidine-oxYL
DOYC	Deity Of Your Choice
DOYKB	Down On Your Knees, Bitch
DPAC	Dedicated Plant Assignment Center
DPA	Delegation of Procurement Authority
DPANS	Draft Proposed American National Standard
DPC	Destination Point Code
DP	Data Processing
DP	Demarcation Point
DP	Dial Pulse [telephony]
DP	Displaced Persons (expelled from native land)
DP	Display Postscript
DP	Double Play
DP	Draft Proposal
DPE	Data Path Extender
DPI	Dots Per Inch
DPM	Defect Per Million
DPM	Digital Panel Meter
DPM	Directional Policy Matrix
DPMI	DOS Protected Mode Interface
DPNPH	Data Packet Network-Packet Handler, "DPN-PH"
DPP	Discounted Payback Period
DPPH	DiPhenylPicrylHydrazyl
DPS	Display PostScript
DPSK	Differential Phased-Shift Keying
DQC	Double-Quantum Coherence
DQ	Dairy Queen
DQDB	Distributed Queue Dual Bus a reservation-strategy MAN 150 Mb/s
DQ	Dragon Quest
DQF	Double-Quantum Filter
DQL	Database Query Language
DQOTD	Dumb Question Of The Day
DRAM	Dynamic Random Access Memory (as opposed to static RAM)
DRAW	Direct Read After Write
DRDA	Distributed Relational Database Architecture
DR	Data Ready
DR	Data Receive
DRD	Data Reading Device
DR	Dead Reckoning
DR	Dining Room
DRE	Directional Reservation Equipment
DRG	Democratic Republic of Germany (East Germany)
DRI	Defense Research Internet (replaces Arpanet)
DRI	Digital Research, Incorporated [Corporate name]
DRMU	Digital Remote Measurement Unit
DRP	DECnet Routing Protocol
DRS	Data Rate Select (RS-232)
DRY	Don't Repeat Yourself
DSAB	Distributed Systems Architecture Board
DSA	Dial System Assistance
DSA	Digital Storage Architecture
DSA	Directory Service Agent
DSBAM	Double-SideBand Amplitude Module
DSC	Differential Scanning Calorimetry
DSC	Document Structuring Conventions
DSCS	Defense Satellite Communications System
DS	Data Segment
DSDC	Direct Service Dial Capability
DSD	Data Structure Diagram
DS	Digital carrier Span
DS	Digital Signal
DS	Directory Service
DS	Direct Signal
DS	Double-Sided
DSE	Data Structure Editor
DSEE	Domain Software Engineering Environment
DSI	Digital Speech Interpolation
DSL	Digital Subscriber Line
DSM	Distinguished Service Medal
DSN	Deep Space Network
DSN	Digital Signal (level) N
DSO	Digital Storage Oscilloscope
DSO	Distinguished Service Order
DSP	Decessit Sine Prole (died without issue)
DSP	Defense Support Program (USAF/NRO)
DSP	Digital Signal Processor; Digital Signal Processing
DSP	Domain-Specific System
DSR	Data Set Ready (RS-232)
DSR	Digital Standard Runoff
DSR	Dynamic Service Register
DSRI	Digital Standard Relational Interface
DSS	Data Station Selector
DSS	Decision Support System
DSS	Direct Station Selection [telephony]
DSSI	Digital Storage Systems Interconnect
DST	Daylight Saving Time
DSTN	Double SuperTwisted Nematic
DSU	Digital Service Unit; Data Service Unit
DSU	Disk Subsystem Unit (Artecon)
DSW	Dick Size War
DSX	Digital System X-connect
DTA	Differential ThermoAnalysis
DTA	Disk Transfer Area
DTAS	Digital Test Access System
DTB	Data Transfer Bus
DTC	Design To Cost
DTC	Digital Trunk Controller
DTC	Di-group Terminal Controller
DT	Data Transmit
DTD	Document Type Definition
DT	Delirium Tremens
DT	Di-group Terminal
DTE	Data Terminal Equipment
DTF	Dial Tone First payphone [telephony]
DTG	Direct Trunk Group
DTI	Department of Trade and Industry (U.K.)
DTIF	Digital Transmission Interface Frame
DTL	Diode Transistor Logic
DTMF	Dial Tone Multi Frequency [telephony]
DTP	DeskTop Publishing
DTR	Data Terminal Ready
DTRT	do the right thing
DTS	Distributed Time Service
DTSS	Dartmouth TimeSharing System
DTU	Demand Transmission Unit
DTU	Di-group Terminal Unit
DTWT	do the wrong thing
DUA	Directory User Agent
DUATS	Direct User Access Terminal System
DU	Decision Unit
DUI	Driving Under the Influence
DUT	Device Under Test
DUV	Data Under Voice
DVC	Digital Voice Card
DV	Deo Vo lente (God willing)
DVI	DeVice Independent
DVI	Digital Video Interactive
DVMA	Direct Virtual Memory Access, see DMA, device uses MMU.
DVM	Digital Volt Meter
DVM	Doctor of Veterinary Medicine
DVMRP	Distance-Vector Multicast Routing Protocol
DVX	Digital Voice eXchange
DWAPS	Defense Warehousing Automated Processing System
DWB	Documenter's WorkBench
DW	Dead Weight
DWI	Driving While Intoxicated
DWIM	Do What I Mean
DX	Distance (as in long distance radio communication)
DXT	Data eXtractT facility
E911	Enhanced 911
EAA	Experimental Aircraft Association
EADAS	Engineering and Administrative Data Acquisition System
EAEO	Equal Access End Office
EAFB	Edwards Air Force Base
EARN	European Academic Research Network
EASD	Equal Access Service Date
EAS	Engineering Administration System
EAS	Extended Announcement System
EAS	Extended Area Service
EASI	Enhanced Asynchronous SCSI Interface
EBCDIC	Extended Binary Coded Decimal Interchange Code
EBI	Extensive Background Investigations
ECAD	Electronical Computer Aided Design
ECAFE	Economic Commission for Africa and the Far East
ECAP	Electronic Customer Access Program
ECASS	Electronically Controlled Automatic Switching System
ECASS	Export Control Automated Support System
ECC	Enter Cable Change
ECC	Error Checking and Correcting
ECC	Error Correction Code
ECCM	Electronic Counter-CounterMeasures
ECCS	Economic C (hundred) Call Seconds
ECD	East Coast Division (Sun)
ECDO	Electronic Community Dial Office
EC	European Community
EC	Exchange Carrier [telephony]
ECF	Enhanced Connectivity Facility
ECG	ElectroCardioGram
ECL	Emitter Coupled Logic (see also TTL)
ECL	Error Correction Logic
ECLSS	Environmental Control and Life Support System [Space]
ECMA	European Computer Manufacturers Association
ECM	Electronic Counter Measure
ECM	European Common Market
ECN	Engineering Computer Network (at Purdue)
ECO	Ecological
ECO	Electronic Central Office
ECO	Engineering Change Order
ECOM	Electronic Computer Originated Mail, "E-COM"
ECPA	Electronic Communication Privacy Act
ECP/EMP	Excessive Cross Post(ing) / Excessive Multi-post(ing)
ECPT	Electronic Coin Public Telephone
ECR	Engineering Change Request
ECSA	Exchange Carriers Standards Association
ECS	Electronic Crosconnect System
ECS	Environmental Control System
ECT	ElectroConvulsive Therapy
ECV	Electric Cargo Vehicle [NASA OEXP]
EDAC	Electromechanical Digital Adapter Circuit
EDA	Electron Donor-Acceptor
EDA	Electronic Design Automation
EDD	Expert Dungeons & Dragons, "ED&D"
EDF	Electricite de France
EDGAR	Electronic Data Gathering, Analysis, and Retrieval
EDGE	Enhanced Data rates for GSM Evolution
EDI	Electronic Data Interchange
EDIF	Electronic Design Interchange Format
EDO	Extended Duration Orbiter [Space]
EDP	Electronic Data Processing
EDS	Electronic Data Systems
EDSX	Electronic Digital Signal X-connect
EDTA	Ethylene Diamine Tetraacetic Acid
EDTCC	Electronic Data Transmission Communications Central
EDT	Eastern Daylight Time
EDV	Elektronische DatenVerarbeitung
E	East
EEC	European Economic Community
EECT	End-to-End Call Trace
EEDP	Expanded Electronic tandem switching Dialing Plan
EE	Electrical or Electronics Engineer
EEG	ElectroEncephaloGram
EEHO	Either End Hop Off
EEI	Equipment-to-Equipment Interface
EEL	Epsilon Extension Language
EEM	External Expansion Module (Sun)
EEO	Errors and Omissions Excepted, "E&EO"
EEPROM	Electrically Erasable Programmable Read Only Memory
E	Espionage
EFD	Ellington Field, Houston TX
EFI	Electronics For Imaging (Co.)
EFIS	Electronic Flight Instrumentation System
EFRAP	Electronic Feeder Route Analysis Program
EFS	Error Free Seconds
EGA	Enhanced Graphics Adapter
EG	Evil Grin
EG	Exempli Gratia, "e.g." (for example)
EGP	Exterior Gateway Protocol
EGREP	Extended GREP
EGRET	Energetic Gamma Ray Experiment Telescope (on GRO)
EHF	Extremely High Frequency (30-300GHz)
EHP	Error Handling Package
EHT	Extended Hueckel Theory
EIA	Electronics Industry Association
EINE	EINE Is Not Emacs
EIN	Employer Identification Number
EIP	Everything Is Permissible
EISA	Extended Industry-Standard Architecture
EISB	Electronic Imaging Standards Board
EIS	Environmental Impact Statement
EIS	Executive Information Systems
EIS	Expanded Inband Signaling
EIS	Extended Instruction Set
EISS	Economic Impact Study System
EISS	European Intelligence Support System
EITS	Encoded Information TypeS
EJASA	Electronic Journal of the Astronomical Society of the Atlantic
EKG	ElectroKardioGramm (see ECG)
EKTS	Electronic Key Telephone Sets
ELC	Extra(Excellent) Low Cost
ELDOR	ELectron-electron DOuble Resonance
EL	ElectroLuminescent (as in display)
ELF	Executable and Linking Format
ELF	Extensible Linking Format
ELF	Extremely Low Frequency
ELLE	Elle Looks Like Emacs
ELM	ELectronic Mailer
ELO	Electric Light Orchestra
ELP	Emerson, Lake and Palmer (or Powell)
ELT	Emergency Locator Transmitter
ELV	Expendable Launch Vehicle [Space]
EMACS	Editor MACroS; Eight Megabytes And Constantly Swapping
EMA	Electronic Mail Association
EMA	Enterprise Management Architecture (DEC)
EMAIL	Electronic MAIL, "E-MAIL"
EMBL	European Molecular Biological Laboratory
EMC	ElectroMagnetic Compatibility
EM	``Ear & Mouth''; recEive & transMit leads of a signalling system, "E&M"
EM	Engineering Model
EM	Enlisted Man (see EW)
EMFBI	Excuse Me For Butting In
EMF	ElectroMotive Force
EMI	ElectroMagnetic Interference
EML	Expected Measured Loss
EMP	ElectroMagnetic Pulse
EMPRESS	EnvironMental Pulse Radiation Environment Simulator for Ships
EMR	ElectroMagnetic Response
EMS	Electronic Message System
EMS	Element Management System
EMS	Element Management System, part of AT&T's UNMA
EMS	Expanded Memory Specification
EMSG	Email message
EMT	Emergency Medical Technician
EMU	ElectroMagnetic Unit
EMU	Extravehicular Mobility Unit [Space]
ENDOR	Electron-Nuclear DOuble Resonance
ENEA	Comitato Nazionale per la Ricerca e per lo Sviloppo dell' Energia Nuclaeare e delle Energie Alternative, Italy
ENET	Ethernet, "E-Net"
ENFIA	Exchange Network Facility for Interstate Access
ENIAC	Electronic Numerical Integrator and Calculator
ENS	ENSign
EOD	End Of Discussion
EOD	Erasable Optical Disk
EOE	Electronic Order Exchange
EOE	Equal Opportunity Employer
EO	End Office [telephony]
EO	Erasable Optical
EOF	End Of File
EOL	End Of Lecture
EOL	End Of Line
EOM	End Of Message
EOM	End Of Month
EOS	Earth Observing System
EOS	Electrical OverStress
EOS	Extended Operating System
EOT	End Of Transmission
EOTT	End Office Toll Trunking
EPA	Enhanced Performance Architecture
EPA	Environmental Protection Agency
EPD	Entry Products Division
EP	Emulation Program
EP	Experience Points
EP	Extended Play
EPL	Electronic switching system Program Language
EPOS	Engineering and Project-management Oriented Support system
EPPS	Electronic Pre-Press Systems.
EPR	Electron Paramagnetic Resonance
EPR	Ethylene Propylene Rubber
EPRI	Electric Power Research Institute
EPROM	Erasable Programmable Read-Only Memory
EPSCS	Enhanced Private Switched Communication Service
EPS	Encapsulated PostScript
EPSF	Encapsulated PostScript File
EPSF	Encapsulated PostScript Format
EPSI	Encapsulated PostScript Interchange
EPT	Empire of the Petal Throne
EPTS	Electronic Problem Tracking System
EPUB	Electronic PUBlication
EPW	Enemy Prisoner of War
EQ	Educational Quotient (see IQ)
EQUEL	Embedded QUEL
ERA	Earned Run Average
ERA	Entity-Relationship-Attribute
ERA	Equal Rights Amendment
ERAR	Error Return Address Register
ERD	Entity-Relationship Diagram
ERE	Entity-Relationship Editor
ER	Emergency Room
EREP	Environmental Recording Editing and Printing
ER	Error Register
ERICA	Experiment on Rapidly Intensifying Cyclones over the Atlantic
ERICA	Eyegaze Response Interface Computer Aid
ERISA	Employee Retirement Income Security Act
ERL	Echo Return Loss
ERP	Effective Radiated Power
ERS	Earth Resources Satellite (as in ERS-1)
ERT	Earth Resources Technology [Space]
ERU	Error Return address Update
ESAC	Electronic Surveillance Assistance Center
ESAC	Electronic Systems Assistance Center
ESA	Enterprise Systems Architecture (MVS/XA followon)
ESA	European Space Agency
ESB	Emergency Service Bureau
ESCA	Electron Spectroscopy for Chemical Analysis
ESD	ElectroStatic Discharge
ESD	Engineering Service Division
ESDI	Enhanced Standard Device Interface
ESE	East South East
ES	End System
ES	Expert System
ES	Extra Segment
ESF	Extended SuperFrame
ESF	Extended Superframe Format
ESH	End System Hello
ESI	ElectroStatic Interference
ESIS	End System-Intermediate System, "ES-IS"
ESL	Emergency Stand-Alone
ESMD	Embeded Storage Module Disk
ESMD	Enhanced Storage Module Device
ESM	Electronic Support Measures
ESM	External Storage Module (Sun)
ESN	Electronic Serial Number
ESN	Electronic Switched Network
ESO	European Southern Observatory
ESOP	Employee Stock Ownership Plan
ESPEC	Ethernet SPECification (DIX)
ESP	Enhanced Service Provider
ESP	Extra Sensory Perception
ESPRIT	European Strategic Programme of Research and Development in Information Technology
ESPS	Entropic Signal Processing System
ESR	Electron Spin Resonance
ESS	Electronic Switching System [telephony]
ESS	Environmental Stress Screening
ESSEX	Experimental Solid State EXchange
ESSX	Electronic Switching Systen eXchange
EST	Eastern Standard Time
ETACC	External Tank/Aft Cargo Carrier, "ET/ACC" (see also ET) [Space]
ETA	Estimated Time of Arrival
ETAS	Emergency Technical ASsistance
ETC	Et cetera, and so on...
ETD	Estimated Time of Departure
ET	Eastern Time
ET	Electron Transfer
ET	External Tank [of the US Space Shuttle]
ET	ExtraTerrestrial [Space]
ETFD	Electronic Toll Fraud Device [telephony]
ETF	Electronic Toll Fraud
ETH	Eidgnoessiche Techniche Hochschule
ETLA	Extended Three Letter Acronym
ETN	Electronic Tandem Network
ETO	Earth-to-Orbit [Space]
ETR	Eastern Test Range
ETSACI	Electronic Tandem Switching Adminstration Channel Interface
ETS	Electronic Tandem Switching
ETS	Electronic Translation System
ETSI	European Telecommunication Standards Institute
ETSSP	ETS Status Panel
ETV	Education TeleVision
EUC	Extended Unix Code
EUNET	European UNIX NETwork, "EUnet"
EUUG	European UNIX Users Group
EUVE	Extreme UltraViolet Explorer
EUV	Extreme UltraViolet
EVA	ExtraVehicular Activity
EVX	Electronic Voice eXchange
EW	Electronic Warfare
EW	Enlisted Woman (see EM)
EWO	Engineering Work Order
EWOS	European Workshop for Open Systems
EWS	Engineering Work Station
EXPO	World Exposition
F2F	Face to Face / Female To Female
FAA	Federal Aviation Administration (U.S.)
FAB	Feature-Advantage-Benefit
FACD	Foreign Area Customer Dialing
FACOM	Fujitsu Automatic Computer
FACS	Facilities Assignment and Control System
FAD	Flavin Adenine Diphosphate
FAE	Fuel Air Explosive
FAESHED	Fuel Air ExploSive, HElicopter Delivered
FA	Factory Automation
FA	Fat Admirer, one who prefers a fat sexual/romantic partner
FA	Finance Accounting (Sun)
FA	Football Association (British soccer)
FA	Fuse Alarm
FAG	Forced Air Gas
FAI	Federation Aeronautique International
FAO	Food and Agriculture Organization [U.S. Government]
FAQ	Frequently Asked Question(s)
FAQL	Frequently-Asked Questions List
FAR	Federal Acquisition Regulation
FAR	Federal Aviation Regulations (U.S.)
FAR	Federation of American Research
FARNET	Federation of American Research NETworks
FAS	Foreign Agricultural Service
FAS	Free Alongside Ship
FASST	Flexible Architecture Standard System Technology
FAST	Fast Auroral SnapshoT explorer
FAST	First Application System Test
FAT	File Allocation Table
FAT	Foreign Area Translation
FAX	FAcsimile
FB	Freight Bill
FBI	Federal Bureau of Investigation [U.S. Government]
FBO	Fixed-Base Operator
FBV	a Dutch acronym for "Fluke, Ltd."
FCAP	Facility CAPacity
FCB	File Control Block
FCC	Federal Communications Commission [U.S. Government]
FCC	Federal Computer Conference
FCC	Forward Command Channel
FCCSET	Federal Coordinating Council for Science, Education and Technology (under OSTP)
FCFS	First Come, First Served
FC	Full Color
FCG	False Cross or Ground
FCO	Field Change Order
FCRC	Federal Contract Research Center
FCS	File Control Systemction
FCS	First Customer Ship (SunOS Releases)
FCS	Frame Check/Control Sequence
FCT	Four Corner Test (4FCT)
FDA	Food and Drug Administration [U.S. Government]
FDC	Floppy Disk Controller
FDDI	Fiber Distributed Data Interface
FDDIII	FDDI supporting isochronous traffic, "FDDI-II"
FD	File Descriptor
FD	Floppy/Flexible Disk(ette)/Drive
FDHD	Floppy Drive High Density
FDIC	Federal Deposit Insurance Corporation [U.S. Government]
FDL	File Definition Language
FDM	Frequency-Division Multiplexing
FDP	Field Development Program
FDR	Franklin Delano Roosevelt
FDX	Full DupleX
FEA	Finite Element Analysis
FEC	Forward Error Correction
FED	Far End Data
FEDSIM	FEDeral Systems Integration and Management center
FE	Format Effecters
FE	Front End
FEHQ	Fluke European HeadQuarters
FEMA	Federal Emergency Management Agency
FEMF	Foreign Electro-Motive Force
FEM	Finite Element Modeling
FEPC	Fair Employment Practices Commission
FEP	Fluorinated Ethylene Propylene
FEP	Front End Processor
FEPS	Facility and Equipment Planning System
FERS	Federal Employees Retirement System
FET	Far East Trading
FET	Federal Excise Tax
FET	Field Effect Transistor
FEV	Far End Voice
FFA	Field Failure Analysis
FFA	Future Farmers of America
FFC	Free For Chat
FF	Fist F*
FF	Flip-Flop
FFRDC	Federally Funded Reseach and Development Center
FFS	Fast File System
FFS	For Fuck's Sake
FFT	Fast Fourier Transform
FGA	Feature Group A, "FG-A" [telephony:Line Side term. for LD carriers]
FGB	Feature Group B, "FG-B" [telephony:Trunk Side term. for LD carriers (aka ENFIA B), 950 service]
FGC	Feature Group C, "FG-C" [telephony]
FGD	Feature Group D, "FG-D" [telephony:Trunk Side term. for LD carriers, 1+ service]
FGM	Female Genital Mutilation
FGREP	Fixed GREP
FGS	Fine Guidance Sensors (on HST)
FHA	Federal Housing Administration
FHA	Future Homemakers of America
FHLMC	Federal Home Loan Mortgage Association (Freddie Mac)
FHMA	Federal Home Mortgage Association (Fannie Mae)
FHST	Fixed Head Star Trackers (on HST)
FIB	Focused Ion Beam
FICA	Federal Insurance Contributions Act
FID	Free Induction Decay
FIDO	Fog Investigation Dispersal Operation
FIFO	First In, First Out
FILO	First In, Last Out
FIMS	Forms Interface Management System
FINE	FINE Is Not Emacs
FIN	Field Information Notice
FIOC	Frame Input/Output Controller
FIO	Frequency In and Out
FIP	Facility Interface Processor
FIPS	Federal Information Processing Standard
FIR	Far InfraRed
FIR	Field Information Report
FIR	Finite Impulse Response
FIRMR	Federal Information Resource Management Regulation
FITB	Fill In The Blank
FIT	Federal Information Technologies, inc.
FITS	Flexible Image Transport System
FLACC	Full Level Algol Checkout Compiler
FL	Florida
FLOP	FLoating point OPeration
FLOPS	FLoating-point OPerations per Second
FLRA	Federal Labor Relations Authority
FLS	Floating License Server
FLT	Front Load Tape
FMAC	Facility Maintenance And Control
FMB	Federal Maritime Board
FMC	Flexible Manufacturing Cell
FMCS	Federal Mediation and Conciliation Service
FMEA	Failure Mode and Effect Analysis
FM	Fibromyalgia
FM	Frequency Modulation
FMR	Field Marketing Representative (Sun)
FMS	Fieldbus Message Specification
FMS	Financial Management Service (Treasury Dept)
FMS	Flexible Machining/Manufacturing System
FMS	Forms Management System
FNC	Federal Networking Council
FNPA	Foreign Numbering Plan Area
FOAC	Federal Office Automation Center
FOAD	F* Off And Die
FOB	Free On Board
FOC	Faint Object Camera (on HST)
FOC	Fiber Optic Communications
FOC	Free Of Charge
FOCSY	FOldover Corrected SpectroscopY
FO	Forecast Order
FO	Foreign Office
FO	Forward Observer
FOIA	Freedom Of Information Act
FOIMS	Field Office Information Management System
FOIRL	Fiber Optic Inter Repeater Link
FON	Fiber Optics Network
FOOBAR	See FUBAR
FORCS	Faa's Operational Reporting Communication System
FORD	Fix Or Repair Daily
FORD	Found On Road Dead
FOR	Free On Rail
FORTRAN	FORmula TRANslator
FOSE	Federal Office Systems Exposition
FOS	Faint Object Spectrograph (on HST)
FOT	Fiber Optic Transceiver
FOT	Free On Truck
FOV	Field Of View
FPA	Floating Point Accelerator
FPC	Fish Protein Concentrate
FPC	Floating Point Coprocessor
FPDU	FTAM Protocol Data Unit
FPE	Floating Point Engine
FPE	Foam PolyEthylene
FPHA	Federal Public Housing Authority
FPLA	Field Programmable Logic Array (see PLA)
FPM	Feet Per Minute
FPO	Fleet Post Office
FPP	Floating Point Processor
FPS	Favorite Play Sequence
FPS	Feet Per Second
FPS	Foot-Pound-Second
FPU	Floating Point Unit
FQDN	Fully-Qualified Domain Name
FRACTAL	FRACTional dimensionAL
FRAM	Ferroelectric RAM
FRB	Federal Reserve Board
FRD	Fire RetarDant
FRED	Fred Resembles Emacs Deliberately
FREE	Fathers Rights and Equality Exchange
FR	Flat Rate
FR	Frame Relay
FRG	Federal Republic of Germany (West Germany)
FRICC	Federal Research Internet Coordinating Committee
FROG	Free Rocket Over Ground
FRPG	Fantasy Role Playing Game
FRR	Flight-Readiness Review
FRS	Federal Reserve System
FRS	Flexible Route Selection
FRU	Field Replacable Unit
FSCM	Federal Supply Code for Manufactures
FSDO	Flight Standards District Office
FSDO	For Some Definition Of
FSE	Field Service Engineer
FSF	Free Software Foundation
FS	Field Service
FS	File System
FS	Fine Structure
FS	Floppy System
FSK	Frequency Shift Keying
FSLIC	Federal Savings and Loan Insurance Corporation
FSS	Fast System Switch (System V)
FSS	Federal Supply Service
FSS	Flight Service Station
FSU	Florida State University
FSU	Former Soviet Union
FSW	Forward Swept Wings
FT1	fractional T1, common carrier transmission in multiples of 64 kb/s
FTAM	File Transfer, Access, and Management (ISO FTP equivalent)
FTC	Federal Trade Commission
FTE	Factory Test Equipment
FT	Foot
FT	Fourier Transform
FTFY	Fixed That For You
FTFY	Fuck This Fuck You
FTG	Final Trunk Group
FTL	Faster Than Light
FTL	For The Loss/Lose
FTM	Female To Male (transgendered)
FTMP	For The Most Part
FTP	File Transfer Protocol
FTPI	Flux Transitions Per Inch
FTR	For The Record
FTS	Federal Telecommunications System [US Government]
FTS	Federal Telephone System [telephony]
FTS	Flight Telerobotic Servicer [Space]
FTW	File Tree Walk
FTW	For The Win
FTZ	FernmeldeTechnisches Zentralamt
FTZ	Free Trade Zone
FUBAR	F***ed Up Beyond All Repair/Recognition
FUD	Fear, Uncertainty, and Doubt
FUSE	Far Ultraviolet Spectroscopic Explorer
FUS	Full-Use Standard
FV	Folio Verso, "fv" (on the back of the page)
FWD	Front Wheel Drive
FW	Fringeworthy
FWHM	Full Width at Half Maximum
FWIW	For What It's Worth
FX	Foreign eXchange [telephony]
FX	Effects (special/sound)
FYA	For Your Action
FY	Fiscal Year
FYI	For Your Information
FYS	For Your Signature
GAAP	Generally Accepted Accounting Principles
GAAS	Gallium Arsenide, "GaAs"
GAB	Group Audio Bridging [telephony]
GADO	General Aviation District Office
GA	Gamblers Anonymous
GA	General Assembly
GA	General Average
GA	General of the Army
GA	Georgia
GA	Go Ahead
GAIA	Earth's self-sustaining Biosphere, "Gaia"
GAIA	GUI Application Interoperability Architecture
GAL	Generic Array Cell
GAN	Global Area Network
GAO	General Accounting Office
GAR	Grand Army of the Republic
GAS	Get-Away Special
GATED	GATEway Deamon
GATT	General Agreement on Tariffs and Trade
GAW	Guaranteed Annual Wage
GB	Gangbusters
GB	GigaByte
GB	Great Britain
GBIP	General Purpose Interface Bus
GBS	Group Bridging Service
GBT	Green Bank Telescope
GCA	General Communications Architecture (Ingres)
GCA	Ground Controlled Approach
GCC	Gnu C Compiler
GCD	Ground Controlled Descent
GC	Garbage Collection (LISP)
GC	Gas Chromatograph(y)
GC	Graphic Context
GCL	Graphics Command Language
GCM	General Court Martial
GCR	Group-Coded Recording (magnetic tape, 6250 bpi)
GCS	Group Control System
GCT	Greenwich Civil Time
GCVS	General Catalog of Variable Stars
GDB	Gnu DeBugger
GDI	Graphical Display Interface
GDOS	Graphics Device Operating System
GDP	Gross Domestic Product
GD&R	Grinning, Ducking, and Running (after a smart ass comment)
GDS	Great Dark Spot
GDT	Global Descriptor Table
GECOS	General Electric Comprehensive Operating System
GECR	Global Environmental Change Report
GE	General Electric
GEISCO	General Electric Information Services COmpany
GEIS	General Electric Information Systems
GEM	Giotto Extended Mission
GEM	Graphics Environment Manager
GEMS	General Electric Medical Systems
GEO	Geosynchronous Earth Orbit [Space]
GFCI	Ground Fault Circuit Interrupter
GF	Girl Friend
GG	Genetic Girl
GGP	Gateway-to-Gateway Protocol
G	Gravity
G	grin
<g>	grin (or <G> big grin, vars. incl <VEG> Very Evil Grin)
GHOD	General Heuristic Organizing Device
GHQ	General HeadQuarters
GHRS	Goddard High Resolution Spectrograph (on HST)
GHZ	Giga HertZ, "GHz" (unit of frequency, 1,000,000,000 cycles per second)
GID	Group IDentity
GIF	Graphics Interchange Format
GI	Galvanized Iron
GI	Gastro Intestinal
GI	General Issue
GIGO	Garbage In, Garbage Out
GI	Government Issue
GIN	Graphics INput
GISS	Goddard Institute for Space Studies
GIYF	Google Is Your Friend
GJIAGDVYFCN	Go Jump In a God Damned Volcano, You Fucking Cave Newt (talk.bizarre)
GKS	Graphical Kernel Standard
GKSM	GKS Metafile
GLBTH	Gay,Lesbian,Bi,Trans,Het
GLHF	Good Luck, Have Fun
GL	Graphic Library
GLOMR	Global Low-Orbiting Message Relay
GLWT	Good Luck With That
GMBH	Gesellschaft Mit Beschraenkter Haftung
GMC	Giant Molecular Cloud
GMD	Gesellschaft fuer Mathematik und Datenverarbeitung
GM	Game Master
GM	General Manager
GM	General Motors
GM	Guided Missile
GMRT	Giant Meter-wave Radio Telescope
GMTA	Great Minds Think Alike
GMT	Greenwich Mean Time
GMW	Give me More Windows
GND	GrouND
GNMA	Government National Mortgage Association (Ginnie Mae)
GNP	Gross National Product
GNU	GNU's Not Unix
GoAT	Go Away, Troll
GOES	Geostationary Orbiting Environmental Satellites
GOK	God Only Knows
GOP	Grand Old Party
GOS	Grade Of Service
GOSIP	Government Open Systems Interconnection Profile
GOWI	Get On With It
GOX	Gaseous OXygen
GPC	General Purpose Computer
GPCI	Graphics Processor Command Interface
GPD	Graphics Products Division
GP	General Practitioner
GP	Grand Prix
GP	Graphics Processor
GP	Group Processor
GPIB	General-Purpose Interface Bus
GPI	Graphics Programming Interface
GPL	General Public License
GPL	GNU Public License
GPL	Graphics Programming Language
GPM	Gross Product Margin
GPO	General Post Office
GPO	Government Printing Office
GPS	General Problem Solver
GPS	Global Positioning System [Space]
GPSI	Graphics Processor Software Interface
GPSS	General Purpose System Simulator
GQ	General Quarters
GRASS	Geographical Resources Analysis Support System
GRB	Gamma Ray Burst(er)
GRD	GRounD
GREP	Global Regular Expression Print, g/re/p, (UNIX command)
GRI	Graduate, Realtors Institute
GRIPS	Government Raster Image Processing Software
GRO	Gamma Ray Observatory [Space]
GROPE	Graphical representation of protocols in Estelle
GRPMOD	GRouP MODulator, "GRP MOD"
GRS	Gamma Ray Spectrometer (on Mars Observer)
GRS	Great Red Spot
GSA	General Services Adminstration [U.S. Government]
GSA	Girl Scouts of America
GSA	Government Services Administration
GSAT	General telephone and electronics SATellite corporation
GSBCA	General Services administration Board of Contract Appeals
GSC	Guide Star Catalog (for HST)
GSFC	Goddard Space Flight Center (Greenbelt, MD) [NASA]
GS	General Schedule
GS	Glide Slope
GS	Golden Shower/Getting Started
GS	Gray-Scale
GSTS	Ground-based Surveillance and Tracking System
GTC	General Telephone Company
GTE	General Telephone and Electric [Corporate name]
GTFO	Get The Fuck Out
G2G	Got To Go
GTG	Got To Go
GTG	Good To Go
GT	Gross Ton
GT	Group Technology
GTO	Gaussian Type Orbital
GTO	Geostationary Transfer Orbit
GTSI	Government Technology Services, inc.
GTT	Global Title Transmission
GUG	Generic UTC Greeting
GUIDE	Graphical User Interface Design Editor (Sun)
GUI	Graphical User Interface
GUS	Guide to the Use of Standards (SPAG publication)
GUUG	German UNIX Users Group
GWEN	Ground Wave Emergency Network
GW	Gamma World
GWS	Graphics Work Station
HACD	Home Area Customer Dialing
HA	Home Automation
HAL	Hard Array Logic
HAL	Hardware Abstraction Layer
HAL	Heuristically programmed ALgorithmic computer (2001)
HAM	Hold And Modify
HAND	Have A Nice Day
HANFS	Highly Available Network File System
HAO	High Altitude Observatory
HAP	Host Access Protocol
HARM	High-Availability, Reliability, and Maintainability
HASP	Houston Automated Spooling Program
HAT	Hashed Address Table
HBA	Host Bus Adapter (SCSI)
HB	HemogloBin, "Hb"
HBM	Her British Majesty; His British Majesty
HBO	Home Box Office
HCFA	Health Care Financing Administration
HCF	Halt and Catch Fire
HC	Holy Communion
HC	House of Commons
HCL	High Cost of Living
HCL	Host Control Links
HCR	Hodge Computer Research, inc.
HCSDS	High-Capacity Satellite Digital Service
HCTDS	High-Capacity Terrestrial Digital Service
HDA	Head Disk Assembly (in winchester disk drives)
HDBV	Host Data Base View
HD	Hard Disk
HD	Heavy Duty
HD	Henry Draper catalog entry
HD	High Density
HDLC	High-level Data Link Control
HDL	High Density Lipoprotein
HDN	Hochgeschwindigkeits-DatenNetz
HDTV	High Definition TeleVision
HDQ	Hung, Drawn & Quartered
HDX	Half DupleX
HDYDT   How Did You Do That
HEAO	High Energy Astronomical Observatory [satellite]
HEAP	Home Energy Assistance Program
HEDM	High Energy-Density Matter [Space]
HE	His Eminence; His Excellency
HEHO	High End Hop Off
HEM	High-level Entity Management
HEMP	Help End Marijuana Prohibition
HEMS	High-level Entity Management System
HEMT	High Electron Mobility Transistor
HEO	High Earth Orbit [Space]
HEP	High Energy Physics
HERA	HErmes Robotic Arm, "HeRA"
HERO	Hazards of Electromagnetic Radiation to Ordnance
HETCOR	HETeronuclear chemical-shift CORrelation
HFC	HyperFine (splitting) Constant
HFE	Human Factors Engineering
HF	Hawthorne Farms (Intel)
HF	High Fantasy
HF	High Frequency (3-30MHz)
HFS	Hierarchical File System (Apple Macintosh)
HFS	HyperFine Splitting
HGA	High Gain Antenna
HGC	Hercules Graphics Card
H	Harn
H	Height
HHIS	hanging head in shame
HHOK/S	Ha Ha, Only Kidding/Serious
HIC	Hybrid Integrated Circuit
HIFO	Highest-In, First-Out
HI	Hawaii
HIIPS	Hud Integrated Information Processing Services
HIPPI	HIgh Performance Parallel Interface
HIPPI	High Performance Peripheral Interface
HIRES	HI-RESolution
HIS	Honeywell Information System
HIV	Human Immuno-deficiency Virus
HLC	Heavy Lift Capability [Space]
HLHSR	Hidden Line & Hidden Surface Removal
HLL	High-Level Language
HLV	Heavy Lift Vehicle [Space]
HMA	High Memory Area
HMC	Halley Multicolor Camera (on Giotto)
HM	High-resolution Monochrome
HMO	Hueckel Molecular Orbital
HMOS	High performance Metal Oxide Semiconductor (see MOS)
HMPA	HexaMethylPhosphorAmide (HMPT)
HMP	Host Monitoring Protocol
HMPT	HexaMethylPhosphoric Triamide
HMS	His/Her Majesty's Ship
HMT	His/Her Majesty's Transport
HNG	Horny Net Geek
HNPA	Home Numbering Plan Area [telephony]
HNS	Hospitality Network Service
HOBIC	HOtel Billing Information Center
HOBIS	HOtel Billing Information System
HOESY	Heteronuclear Overhauser Enhancement SpectroscopY
HOL	High-Order System
HOMO	Highest Occupied Molecular Orbital
HOTOL	HOrizontal Take-Off and Landing
HOW	Home Owners Warranty
HPFS	High Performance File System (OS/2)
HPGE	High Purity Germanium
HPGL	Hewlett Packard Graphics Language
HP	Hewlett-Packard, inc. [Corporate name]
HP	Higher Power (sort of an AA "in" term, usually God)
HP	High Pressure
HP	Hit Points
HP	HorsePower
HPIB	Hewlett-Packard Interface Bus
HPLC	High-Performance Liquid Chromatography
HPLT	High-Productivity Languages/Tools, "HPL/T"
HPO	High Performance Option
HPPA	HP Precision Architecture
HQ	HeadQuarters
HR	Hertzsprung-Russell (diagram)
HRH	Her/His Royal Highness
HR	House of Representatives
HR	Human Resources
HRI	High Resolution Imager (on ROSAT)
HSB	Hue, Saturation, Brightness
HSC	Hierarchical Storage Controller
HSFS	High Sierra File System
HS	High School
HSI	High Speed Interface
HSI	Horizontal Situation Indicator
HSLN	High Speed Local Network
HSP	High Speed Photometer (on HST)
HSSDS	High-Speed Switched Digital Service
HST	Hawaiian Standard Time
HST	High Speed Technology
HST	Hubble Space Telescope
HTF	How The Fuck
HTH	Hope This Helps
HTH	Hand To Hand [combat]
HTH	Happy To Help
HTH	How The Hell
HTH	Hand To Hand [combat]
HT	High Tension (as in electric power transmission)
HT	Horizontal Tab
HTK	Hits To Kill
HUAC	House Unamerican Activities Committee
HUD	Heads Up Display
HUD	Housing and Urban Development [U.S. Government]
HUGE	Hewlett-packard Unsupported Gnu Emacs
HU	High Usage
HUTG	High Usage Trunk Group
HUT	Hopkins Ultraviolet Telescope (ASTRO package)
HVAC	Heating, Ventilation, and Air Conditioning
HV	High Voltage
HW2000	Highway 2000
HWD	Hayward CA
HWM	High-Water Mark
HWNINS	He whose name is not spoken
HWP	Height and Weight Proprotional (i.e.: "normal" build)
HWSNBN	He who should not be named
HWWNBN	He Who Will Not Be Named (refers to a specific troll person)
HZ	HertZ, "Hz" (unit of frequency, cycles per second)
I18N	InternationalizatioN (count the letters)
IAAL	I Am Actually Laughing
IAB	Interactive Application Builder
IAB	Internet Activities Board
IAC	In Any Case
IAD	Dulles International, Washington DC
IAEA	International Atomic Energy Agency
IAE	In Any Event
IAH	Houston (Intercontinental) TX
IA	Inspection Authorization
IANA	Internet Assigned Numbers Authority
IANAL	I Am Not A Lawyer
IAP	Internet Access Provider
IAPPP	International Amateur/Professional Photoelectric Photometry
IATA	International Air Transport Association
IAUC	IAU Circular
IAU	International Astronomical Union
IAW	In Accordance With
IB	Instruction Buffer
IBM	Ingrained Batch Mentality
IBM	International Brotherhood of Magicians
IBM	International Business Machines [Corporate name]
IBM	Itty Bitty Machines
IBN	Integrated Business Network
ICAN	Individual Circuit ANalysis
ICB	Interstate Computer Bank
ICBM	InterContinental Ballistic Missile
ICBW	I Could Be Wrong
ICCC	Inter-Client Communication Convention (X)
ICCCM	Inter-Client Communication Conventions Manual
ICC	Interstate Commerce Commission
ICD	Interactive Call Distribution
ICE	In-Circuit Emulator
ICE	International Cometary Explorer
ICE	Intrusion Countermeasures Electronics
ICI	Imperial Chemical Industries
IC	Independent Carrier
IC	Integrated Circuit
IC	Interexchange Carrier [telephony] (see also IEC)
IC	Inter-LATA Carrier
ICJ	International Court of Justice
ICLID	Individual Calling Line ID
ICL	International Computers Limited
ICM	Integrated Call Management
ICMP	Internet Control Message Protocol
ICOCBW	I Could Of Course Be Wrong
ICON	Inter CONtinental
ICP	Integrated Channel Processor
ICP	Inventory Control Points
ICRC	International Cosmic Ray Conference
ICSC	Inter-LATA Customer Service Center
ICST	Institute for Computer Science and Technology
ICT	In-Circuit Test
ICT	Information and Communication Technologies
ICT	Interactive Consumer Terminal
ICYMI	In Case You Missed It
IDA	Intercommunication Data Areas
IDA	International Dark-sky Association
IDA	International Development Association
IDC	Insulation Displacement Contact
IDDD	International Direct Distance Dial [telephony]
IDEA	International Dance Exercise Association
IDEA	Internet Design, Engineering, and Analysis notes (IETF RFCs)
IDE	Integrated Development Environment
IDE	Integrated Drive Electronics
IDE	Interactive Development Environments, inc
IDF	Intermediate Distributing Frame [telephony]
IDGI	I Don't Get It
ID	Idaho
ID	IDentification
IDI	Initial Domain Identifier
IDK	I Don't Know
IDL	Interactive Data Language
IDL	Interface Description Language
IDM	Image Data Manager
IDP	Initial Domain Part
IDP	Internet Datagram Protocol (XNS equivalent to IP)
IDS	Internal Directory System
IDTS	I Don't Think So
IDVC	Integrated Data/Voice Channel
IDV	Interlibrational Derived Vehicle [Space]
IEC	InterExchange Carrier [telephony] (see also IC)
IEC	International Electrotechnical Commission
IEEE	Institute of Electrical and Electronics Engineers
IEE	Institute of Electrical Engineers (UK)
IE	Id Est, "i.e." (that is)
IE	Id Est (that is)
IE	Indo-European
IE	Inter Ethernet
IEN	Internet Engineering Notes
IEN	Internet Experiment Notebook (precedes RFCs)
IESG	Internet Engineering Steering Group
IETF	Internet Engineering Task Force
IETGFTP	It's Easier To Get Forgiveness Than Permission
IFB	Invitation For Bids
IFC	International Finance Corporation
IFC	International Freighting Corporation
IFF	Identification - Friend or Foe
IFF	Image File Format
IFF	Interchange File Format
IFF	Iterative Function Fractal
IF	InterFace, "I/F"
IF	Intermediate Frequency
IFIP	International Federation for Information Processing
IFLA	International Federation of Library Associations
IFR	Instrument Flight Rules
IFRPS	Intercity Facility Relief Planning System
IGES	Initial Graphics Exchange Standard
IGM	InterGalactic Medium
IGMP	Internet Group Multicast Protocol
IGP	Interior Gateway Protocol
IGY	International Geophysical Year
IHA	I Hate Acronyms
IHP	Indicated HorsePower
IHS	Integrated Hospital Support
IIA	Information Industry Association
IIANM	If I Am Not Mistaken
IIE	Institute of Industrial Engineers
IIHF	International Ice Hockey Federation
IIL	Integrated Injection Logic
IIN	Integrated Information Network
IINM	If I'm Not Mistaken
IIRC	If I Recall Correctly
IISPB	Image and Information Standards Policy Board
IIUC	If I Understand Correctly
ILO	International Labor Organization
ILS	Instrument Landing System
ILV	Industrial Launch Vehicle [Space]
IMAO	In My Arrogant Opinion
IMAP3	Interactive Mail Access Protocol - Version 3
IMAP	Interactive Mail Access Protocol
IMAS	Integrated Mass Announcement System
IMC	Instrument Meteorological Contitions
IMCO	In My Considered Opinion
IMD	Industry Marketing Development
IME	In My Experience
IMF	International Monetary Fund
IMHO	In My Humble Opinion
IM	Installation & Maintenance, "I&M"
IM	Instant Message
IM	Interface Module
IMM	Input Message Manual
IMNERHO	In My Never Even Remotely Humble Opinion
IMNSHO	In My Not So Humble Opinion
IMO	In My Opinion
IMPACT	Inventory Management Program and Control Technique
IMP	Interface Message Processor [ARPANET/MILNET] (replaced by PSN)
IMSA	International Motor Sports Association
IMS	Integrated Management System
IMSL	International Mathematical Subroutine Library
IMSLTHO	In My Slightly/Somewhat Less Than Humble Opinion
IMSO	Integrated Micro Systems Operation (Intel)
IMSVS	Information Management System/Virtual Storage, "IMS/VS"
IMT	Image Management Terminal
IMT	Inter-Machine Trunk
IMTS	Improved Mobile Telephone Service
IMX	In My eXperience (perferred form: IME)
INADEQUATE	Incredible Natural Abundance Double-QUAntum Transfer Experiment
INADS	INitialization and ADministration System  [telephony]
INC	InterNational Carrier
INDO	Intermediate Neglect of Differential Overlap
INDOR	INternuclear DOuble Resonance
INEPT	Insensitive Nucleus Enhancement by Polarization Transfer
INGRES	Interactive Graphic Retrieval System
IN	Indiana
IN	Intelligent Network
INL	Inter Node Link
INMS	integrated network management system, part of AT&T's UNMA
INN	Inter Node Network
INOC	Internet Network Operations Center
INRIA	Institut National de Recherche en Informatique et Automatique
INRI	Iesus Nazerenus Rex Iudaeorum (Jesus of Nazareth, King of the Jews)
INS	Immigration and Naturalization Service
INS	Inertial Navigation System
INS	Information Network System
INSTITUTE	INSTITUTE's Name Shows That It's Totally Unrelated To EMACS
INTAP	INteroperability Technology Association for information Processing
INTELSAT	INternational TELecommunications SATellite consortium
INWATS	INward Wide Area Telephone Service [telephony]
IOCC	International Overseas Completion Center
IOC	Input/Output Controller
IOC	International Operating Center [telephony, US]
IOD	Identified Outward Dialing
IO	Input/Output, "I/O"
IO	Inward Operator
IONL	Internal Organization of the Network Layer
IOOF	International Order of Odd Fellows
IOP	Input-Output Processor
IOTA	Infrared-Optical Telescope Array
IOTA	International Occultation Timing Association
IOT	InterOffice Trunk
IOU	I Owe you (U)
IOW	In Other Words
IPCC	Intergovernmental Panel on Climate Change
IPCE	InterProcess Communication Environment
IPC	Integrated Personal Computer
IPC	InterProcess Communication
IPC	Inventory Process Control
IPCS	Interactive Problem Control System
IPDU	Internet Protocol Data Unit
IPE	Integrated Programming Environment
IPI	Intelligent Peripheral Interface
IP	Industrial Products
IP	Information Provider [telephony]
IP	Innings Pitched
IP	Instruction Pointer
IP	Intermediate Point
IP	Internet Protocol
IPLAN	Integrated PLanning And Analysis
IPL	Initial Program Load
IPM	Impulses Per Minute
IPM	Interruptions Per Minute
IPMS	InterPersonal Message Services
IPO	Initial Public Offering
IPO	International Procurement Office
IPSE	Integrated Project-Support Environment
IPS	Inches Per Second
IPS	Inertial Pointing System
IPS	Information Processing Standards
IPT	Williamsport PA
IPX	Internetwork Packet exchange (of Novell Inc.)
IPXSPX	Internet Packet eXchange/Sequenced Packet eXchange (Novell), "IPX/SPX"
IQ	Intelligence Quotient (see EQ)
IQR	Inquiry
IRAF	Image Reduction and Analysis Facility
IRA	Individual Retirement Account
IRA	Interprocedural Register Allocation
IRA	Irish Republican Army
IRAS	Infrared Astronomical Satellite
IRBM	Intelligent Repeater Bridge Module
IRBM	Intermediate Range Ballistic Missile
IRC	International Record Carrier
IRC	Internet Relay Chat
IRD	Investment Recovery Department
IRDS	Information Resource Dictionary Standard
IRDS	InfraRed Detection Set
IRE	Institute of Radio Engineers (old name for the now IEEE, q.v.)
IRG	InterRecord Gap
IR	Index Register
IR	Information Resource
IR	InfraRed
IR	Internetwork Router
IRL	In Real Life
IRM	Information Resources Management
IRM	Intelligent Repeater Module
IRMS	Information Resources Management Service
IRN	Intermediate Routing Node
IROR	Internal Rate Of Return
IRQ	Interrupt ReQuest
IRSG	Internet Research Steering Group
IRS	Inertial Reference System
IRS	Internal Revenue Service
IRTF	Internet Research Task Force
IRT	In Reply To, In Regards To
ISA	Industry-Standard Architecture
ISAM	Indexed Sequential Access Method
ISAS	Institute of Space and Astronautical Science (Japan)
ISBD	International Bibliographic Description
ISBN	International Standard Book Number
ISCH	Interstitial-Cell-Stimulating Hormone (same as LH)
ISC	Information Services Center
ISC	Interactive Systems Corporation
ISC	International Switching Center
ISDN	Integrated Services Digital Network
ISDT	Integrated Systems Development Tool
ISEE	International Sun Earth Explorer (usually ISEE-3)
ISF	Information Systems Factory
ISFUG	Integrated Software Federal User Group
ISH	Intermediate System Hello
ISI	Information Sciences Institute (at USC)
IS	Information Separator
IS	Information Systems
IS	Intermediate System
IS	International Standard
IS	Interrupt Set
ISIS	Intermediate System to Intermediate System, "IS-IS"
ISLM	Integrated Services Line Module
ISLU	Integrated Services Line Unit
ISM	InterStellar Medium
ISN	Information Systems Network
ISN	Integrated Systems Network
ISODE	ISO Development Environment
ISO	Infrared Space Observatory
ISO	In Search Of
ISO	International Standards Organization
ISOO	Information Security Oversight Office
ISOP	Incentive Stock Option Plan
ISP	Internet Service Provider
ISPM	International Solar Polar Mission
ISRG	Independent Space Research Group
ISR	Institute of Snow Research
ISSI	Information Security Systems Inc.
ISS	Integrated Switching System
ISSN	Integrated Special Services Network
ISSN	International Standard Serial Number
IST	Initial System Test
ISTM	It Seems To Me
ISTR	I Seem To Recall
ISUP	Integrated Services User Part
ISV	Independent Software Vendor
ISV	Instantaneous Speed Variation
ISY	International Space Year
ITC	Independent Telephone Company
ITC	Inter-Task Communication
IT	Industrial Technology
IT	Information Technology
ITM	Information Technology Management
ITMT	In The MeanTime
ITSEC	Information Technology Security Evaluation Criteria
ITSFWI	If The Shoe Fits, Wear It
ITS	Incompatible Timesharing System
ITS	Institute of Telecommunication Science
ITSO	Incoming Trunk Service Observation
ITT	International Telephone and Telegraph
ITU	International Telecommunications Union
ITUSA	IT Users Standards Association
ITYM	I Think You Mean
IUE	International Ultraviolet Explorer
IU	Integer Unit
IUS	Inertial Upper Stage [Space]
IUV	Interlibrational Utility Vehicle [Space]
IVDT	Integrated Voice/Data Terminal
IVP	Installation Verification Program
IVTS	International Video Teleconferencing Service
IWBNI	It Would Be Nice If
IWC	Inside Wire Cable
IWS	Intelligent Work-Station
IWW	International Workers of the World
IXC	IntereXchange Carrier (aka LD)
IX	Interactive eXecutive
IXM	IntereXchange Mileage
IYKWIM(AITYD)	If You Know What I Mean (And I Think You Do)
IYSWIM	If You See What I Mean
JACM	Journal of the Association for Computing Machinery
JAFO	Just Another F**king Observer
JAL	Japan Airline
JANET	Joint Academic Network (U.K.)
JBOD	Just a Bunch Of Disks
JBS	John Birch Society
JCAC	Joint Civil Affairs Committee
JCAE	Joint Committee on Atomic Energy
JCA	Jewelry Crafts Association
JCAMP	Joint Committee on Atomic and Molecular Physical data
JCEE	Joint Council on Economic Education
JCET	Joint Council on Educational Television
JC	Jesus Christ
JC	Joint Compound (plumbing)
JC	Julius Caesar
JC	Junior College
JCL	Job Control Language
JCS	Joint Chiefs of Staff
JD	Justice Department
JDS	John Dewey Society
JECC	Japan Electronic Computer Company
JEIDA	Japan Electronics Inderstry Development Association
JEM	Japanese Experiment Module (for SSF)
JES	Job Entry System
JES	John Ericsson Society
JESUS	Job Entry System of the University of Saskatuan
JFET	Junction FET
JFIF	JPEG File Interchange Format
JFK	John F. Kennedy (and the international airport)
JFMIP	Joint Financial Management Improvement Program
JFS	Next Generation of JLE
JFTR	Just For The Record
JGR	Journal of Geophysical Research
JIC	Joint Industry Council
JIC	Joint Intelligence Center
JIC	Just in Case
JI	Justice, Inc.
JILA	Joint Institute for Laboratory Astrophysics
JIM	Job Information Memorandum
JINTACCS	Joint INteroperability of TActical Command and Control Systems
JISC	Japanese Industrial Standards Committee
JIS	Japan Industrial Standards
JIT	Just In Time
JK	Just Kidding / JoKe
JLE	Japanese Language Enveronment
JLMK	Just Let Me Know
JMHO	Just My Honest/Humble Opinion
JMO	Just My Opinion
JMS	John Milton Society
JMX	Jumbogroup MultipleX
JOAT	Jack Of All Trades
JO	Job Order
JO	Junior Officer
JOOC	Just Out of Curiosity
JOVE	Jonathan's Own Version of Emacs
JOVIAL	Jules Own Version of the International Algorithmic Language
JPEG	Joint Photographic Experts Group
JPL	Jet Propulsion Laboratory
JRC	Junior Red Cross
JSC	Johnson Space Center (NASA)
JSD	Jackson System Development
JSN	Junction Switch Number
JSRC	Joint Services Review Committee
JST	Japan Standard Time
JSW	Junctor SWitch
JTIDS	Joint Tactical Information Distribution Systems
JTLYK	Just To Let You Know
JTM	Job Transfer and Manipulation
JUNET	Japan UNIX Network
JV	Junior Varsity
JVNC	John von Neumann (Super Computer) Center, "JvNC"
JVNCNET	John von Neumann (Super Computer) Center network, "JvNCnet"
K9	canine (K9 corps - army dogs)
KAO	Kuiper Airborne Observatory
KAOS	Killing as Organized Sport
KB	Key Board
KB	KiloByte
KBPS	KiloBits Per Second
KBS	Knowledge-Based System
KC	King's Counsel (QC when queen reigning)
KC	Knights of Columbus
KCL	Kyoto Common Lisp
KDCI	Key Display Call Indicator
KDD	Kokusai Denshin Denwa Co.
KD	Kiln Dried
KD	Knocked Down; Knock-Down
KDT	Keyboard Display Terminal
KERMIT	Kl-10 Error-free Reciprocal Micro Interconnect over Tty lines
KFT	KiloFeeT
KGB	Komitet Gosudarstvennoi Bezopaznosti
KHYF	Know How You Feel
KHz	Kilo HertZ (unit of frequency, 1000 cycles per second)
KIA	Killed In Action
KIAS	Knot Indicated Air Speed
KIF	Key Index File
KI	Kiwanis International
KI	Kuenstliche Intelligenz
KIP	Kinetics IP
KIPS	Kawasaki Integrated Power-valve System
KISS	Keep It Simple, Stupid
K	Kilobit
KLIPS	thousands of Logical Inferences Per Second
KLOC	thousands of Lines Of Code
KNF	Kernel Normal Form
KO	Knock Out
KOWC	Key Word Out of Context
KP	Key Pulse [telephony]
KP	Kitchen Police
KPNO	Kitt Peak National Observatory
KPO	KeyPunch Operator
KQC	King's College London
KR	Kernighan and Ritchie, the c programming language, "K&R"
KSC	Kennedy Space Center (NASA)
KSF	Key Success Factor
KSH	Korn SHell
KS	King's Scholar
KSR	Keyboard Send-Receive
KSU	Key System Unit [telephony]
KTB	Cretaceous-Tertiary Boundary (from German)
KTB	Kali's Teeth Bracelet
KTHX	OK, Thanks
KTHXBYE	OK, Thanks, goodbye
KTS	Key Telephone System [telephony]
KTU	Key Telephone Unit [telephony]
KWIC	Key Word In Context
KY	Kentucky
L1	Lagrange Point #1 35,000 Miles above moon [Space]
L2	Lagrange Point #2 40,000 Miles behind moon [Space]
L3	Lagrange Point #3 (?? 35,000 Miles below moon) [Space]
L4	Lagrange Point #4 240,000 mile Earth orbit [Space]
L5	Lagrange Point #5 240,000 mile Earth orbit [Space]
L8R	Later
LAB	Labor
LAC	Loop Assignment Center
LADAR	LAser Detection And Ranging
LADT	Local Access Data Transport
LAIS	Local Automatic Intercept System
LAL	Local Analog Loopback
LA	Los Angeles
LA	Louisiana
LA	Low Altitude
LAMA	Local Automatic Message Accounting [telephony]
LAM	Master of Liberal Arts
LANCE	Local Area Network Controller for Ethernet
LANL	Los Alamos National Laboratory
LAN	Local Apparent Noon
LAN	Local Area Network
LAPB	Link Access Procedure - Balanced (X.25)
LAPD	Link Access Procedure on the D channel
LAPD	Los Angeles Police Department
LAP	Link Access Procedure
LAPM	Link Access Procedure for Modems
LARC	Langley Research Center, "LaRC" [NASA]
LAR	Local Acquisition Radar
LART	Luser Attitude Readjustment Tool (i.e.: clue-by-four)
LASER	Light Amplification by Stimulated Emission of Radiation
LASS	Local Area Signaling Service
LATA	Local Access Transport Area
LATIS	Loop Activity Tracking Information System
LAT	Local Apparent Time
LAT	Local Area Transport (DEC)
LAVC	Local Area VAX Cluster
LAX	Los Angeles International Airport
LBHS	Long Beach High School
LB	Light Bomber
LBL	Lawrence Berkeley Labs
LBO	Line Buildout
LB	pound (LiBra)
LBS	Load Balance System
LBS	Pounds
LCA	Logic Cell Array
LCAMOS	Loop CAble Maintenance Operation System
LCAO	Linear Combination of Atomic Orbitals
LCCIS	Local Common Channel Interoffice Signaling
LCCL	Line Card CabLe
LCCLN	Line Card Cable Narrative
LCD	Liquid Crystal Display
LCD	Lowest Common Denominator
LCDN	Last Called Directory Number
LCDR	Lieutenant Commander
LCIE	Lightguide Cable Interconnection Equipment
LC	inductor-Capacitor circuit (as in filters, L is symbol inductance)
LCL	Lunar Cargo Lander [NASA OEXP]
LCLOC	Line Card LOCation
LC	Lower Case, "l.c."
LCM	Life Cycle Management
LCN	Logical Channel Numbers
LCP	Link Control Protocol
LCR	Least Cost Routing
LCRMKR	Line Card ReMarKs, Retained
LCSE	Line Card Service and Equipment
LCSEN	Line Card Service and Equipment Narrative
LCS	Laboratory for Computer Science [MIT]
LCT	Landing Craft Tanks
LDC	Logical Device Coordinates
LDC	Long Distance Carrier [telephony]
LDEF	Long Duration Exposure Facility
LDF	Large Deployable Reflector [Space]
LDL	Local Digital Loopback
LDL	Low Density Lipoprotein
LDMTS	Long Distance Message Telecommunications Service
LDP	Laboratory Data Products
LDS	The Church of Jesus Christ of Latter-Day Saints
LDT	Local Descriptor Table
LDX	Long Distance eXtender [telephony]
LEAP	Low-power Enhanced At Portable
LEAS	LATA Equal Access System
LEC	Local Exchange Carrier [telephony]
LED	Light-Emitting Diode
LEGO	Low End Graphics Option
LE	Lance Ethernet
LEM	Lunar Excursion Module (a.k.a. LM) (Apollo spacecraft)
LENCL	Line Equipment Number CLass
LEO	Low Earth Orbit [Space]
LERC	Lewis Research Center, "LeRC" [NASA]
LEST	Large Earth-based Solar Telescope
LFACS	Loop Facilties Assignment And Control System
LF	Line Feed Character
LF	Line Finder
LF	Low Frequency (30-300KHz)
LFSA	List of Frequently Seen Acronyms
LFS	Loopback File System
LGA	Low Gain Antenna
LGB	Lesbian/Gay/Bisexual
LGB	Long Beach CA
LGBO	Lesbian/Gay/Bisexual and any others we've missed, "LGBO*"
LGM	Little Green Men
LGTM	Looks Good To Me
LHD	Litterarum Humaniorum Doctor (doctor of human letters)
LH	Left Hand
LH	Liquid Hydrogen (also LH2 or LHX)
LH	Lower Half
LH	Luteinizing Hormone (same as ISCH)
LHS	Left Hand Side
LIDAR	LIght Detection And Ranging
LIFIA	Laboratoire d'Informatique Fondamentale et d'Intelligence Artificielle
LIFO	Last In, First Out
LI	Long Island
LIM	Lotus-Intel-Microsoft (memory specification)
LIMM	Lotus Intel Microsoft Memory (PC world)
LIMS	Labor-Informations-Management-System
LINC	Laboratory INstrument Computer
LIPS	Logical Inferences Per Second
LISA	Large Installation System Administration
LIS	Lanthanide-Induced Shift
LISP	LISt Processing Language
LIST	List-Oriented Interactive Language
LIU	Line Interface Unit
LJBF	Let's Just Be Friends
LLAMA	Logic Lacking A Meaningful Acronym
LLB	Legum Baccalaureus (bachelor of laws)
LLCLINK	Layer Control Protocol (?), "LLCLink"
LLC	Logical Link Control
LLD	Leather Lifestyle Dork(s)
LLD	Legum doctor (doctor of laws)
LL	Late Latin
LL	Long Lines [telephony]
LLN	Line Link Network [telephony]
LLNL	Lawrence-Livermore National Laboratory
LLO	Low Lunar Orbit [Space]
LLOX	Lunar Liquid OXygen [Space]
LLP	Line Link Pulsing [telephony]
LMAO	Laughing My Ass Off
LMFAO	Laughing My F***ing Ass Off
LMC	Large Magellanic Cloud (see SMC)
LME	Layer Management Entity
LMF	License Management Facility
LMK	Let Me Know
LM	Lan Manager
LM	Life Master (Contract Bridge ranking)
LM	Lunar Module (a.k.a. LEM) (Apollo spacecraft)
LMMS	Local Message Metering System
LMOS	Line Maintenance Operations System [telephony, AT&T]
LMSO	Laughing My Socks Off
LN2	Liquid N2 (Nitrogen)
LNG	Liquified Natural Gas
LOA	Lands of Adventure
LOA	Leave Of Absence
LOB	Line Of Balance
LOB	Line Of Building
LOCAP	LOw CAPacitance
LOC	Lines Of Code
LOC	Local Operating Company
LOE	Level Of Effort
LOF	Lock OFf-line
LOFT	Launch Operations Flight Test [Space]
LOI	Letter Of Intent
LO	Lake Oswego
LO	Leverage Out
LOL	Laughing Out Loud
LON	Lock ON-line
LOOPS	Lisp Object Oriented Programming System
LOP	Lines Of Position
LORAN	Long RANge Navigation
LOSF	Lunar Orbit Staging Facility [Space]
LOS	Line Of Sight
LOS	Los Angeles
LOTS	Low Overhead Timesharing System
LOX	Liquid OXygen
LPCDF	Low Profile Combined Distributing Frame
LPC	Linear Predictive Coding (speech processing)
LPDA	Link Problem Determination Aid
LPF	League for Programming Freedom
LPG	Liquified Petroleum Gas
LPG	Low Pressure Gas
LP	Linear Prediction
LP	Linear Programming
LPL	Lunar Personnel Lander [NASA OEXP]
LP	Long Play(ing) (record)
LP	Low Pressure
LPN	Licensed Practical Nurse
LPP	Licensed Program Products
LPR	Line PrinteR
LPT	Line PrinTer
LPT	Lunar Propellant Tanker [NASA OEXP]
LPV	Lunar Piloted Vehicle [NASA OEXP]
LQ	Letter Quality
LRAP	Long Route Analysis Program
LRB	Liquid Rocket Booster [Space]
LRBM	Long Range Ballistic Missile
LRC	Longitudinal Redundancy Character
LRS	Line Repeater Station
LRSP	Long Range System Plan
LRSS	Long Range Switching Studies
LRU	Least Recently Used
LRU	Line Replaceable Unit
LSAP	Long Service Access Point
LSB	Least Significant Bit; Least Significant Byte
LSB	Lower Side Band
LSC	Lecture Series Committee [MIT]
LSC	LightSpeed C
LSD	Least Significant Digit
LSD	LySergic acid Diethylamide
LSD	pounds (Libra), shillings (Sestertii), and (old) pence (Denarii)
LSELLINK	Layer Selector (?), "LSELLink"
LSI	Large Scale Integration
LS	Left Side
LS	Letter Signed
LS	Locus Sigilli (place of seal)
LSP	LightSpeed Pascal
LSR	Local Standard of Rest
LSRP	Local Switching Replacement Planning system
LSSD	Level-Sensitive Scan Detection
LSS	Life Support System
LSS	Loop Switching System
LSV	Line Status Verifier
LTAB	Line Test Access Bus
LTA	Lighter Than Air
LTC	Lieutenant Colonel
LTC	Local Test Cabinet
LTD	Local Test Desk
LTF	Lightwave Terminating Frame
LTF	Line Trunk Frame
LTG	Line Trunk Group
LTJG	Lieutenant Junior Grade
LTL	Less than Truckload Lot
LT	Long Ton
LT	Low Tension
LTMS	Laughing To MySelf
LTNS	Long Time No See
LTPD	Lot Tolerance Percent Deffective
LTP	Lunar Transient Phenomenon
LTR	Long Distance Relationship
LTR	Long Term Relationship
LTS	Loss Test Set
LTV	Loan To Value
LTVR	LTV Ratio
LUG	Local Users Group
LU	Logical Unit
LUMO	Lowest Unoccupied Molecular Orbital
LUN	Logical Unit Number
LUT	Look-Up Table
LWM	Low-Water Mark
LWP	Light Weight Process
LWSP	Linear White-SPace
LWT	Last Will and Testament
LXE	Lightguide eXpress Entry
LZ	Landing Zone
MAAP	Maintenance And Administration Panel
MAC	Apple MACintosh computer
MACBS	Multi-Access Cable Billing System
MAC	Mandatory Access Control
MAC	Media Access Control
MAC	Military Air Command
MAC	Move, Add, Change
MAC	Multiple Analogue Component
MACSYMA	project MAC's SYmbolic MAnipulation System
MADD	Mothers Against Drunk Driving
MAD	Mass Air Delivery
MAD	Mutual Assured Destruction
MADN	Multiple Access Directory Numbers
MAF	Marine Abkuerzungs Fimmel (roughly navy abbreviation spleen?)
MAG	Magazine
MAJOUR	Modular Application for JOURnals
MA	Maintenance Administrator
MA	Massachusetts [US state postal designation]
MAN	Metropolitan Area Network
MAP	Maintenance and Administration Position
MAP	Management Assesment Program
MAP	Manufacturing Automation Protocol (GM's Token-Passing "Ethernet")
MAP	Marketing Assistance Program
MAPSS	Maintenance & Analysis Plan for Special Services
MAPTOP	Manufacturing Automation Protocol/Technical Office Protocol, "MAP/TOP"
MARBI	MAchine Readable form of Bibliographic Information
MARC	MAchine Readable card Catalog
MARC	Market Analysis of Revenue and Customers system
MAR	Microprogram Address Register
MARS	Multiuser Archival and Retrieval System
MASB	MAS Bus
MASC	MAS Controller
MASC	Multiple Award Schedule Contract
MASER	Microwave Amplification by Stimulated Emission of Radiation
MASH	Mobile Army Surgical Hospital
MAS	Magic Angle Spinning
MAS	MAin Store
MAS	Mass Announcement System
MASM	MAS Memory
MAST	Multi-Application SOnar Trainer
MATCALS	Marine Air Traffic-Control And Landing System, "MAT-CALS"
MATFAP	Metropolitan Area Transmission Facility Analysys Program
MAU	Math Acceleration Unit
MAU	Media Access Unit
MAU	Medium Attachment Unit
MAU	Multiple Access Unit
MAU	Multistation Access Unit
MAXI	Modular Architecture for the Exchange of Information (DoD)
MBA	Management Business Analyst
MBA	Master Business Administration
MBBA	p-MethoxyBenzylidene-p-n-ButylAniline
MB	Manned Base
MB	MegaByte (1MB=1048576 bytes)
MBO	Management By Objectives
MBPS	MegaBits/Bytes Per Second
MBWA	Management By Walking Around
MCAD	Mechanical Computer Aided Design
MCAE	Mechanical Computer Aided Engineering
MCA	Mechanical Computer Aided Design
MCA	Micro Channel Architecture
MCC	Master Control Center
MCC	Master Control Console
MCC	Microelectronics & Computer Consortia (Austin based)
MCC	Mission Control Center
MCCS	Mechanized Calling Card Service
MCHB	Maintenance CHannel Buffer
MCH	Maintenance CHannel
MCIAS	Multi-Channel Intelligent/Intercept Announcement System
MCI	Media Control Interface
MCI	Microwave Communications Incorporated
MC	Management Committee
MC	Master of Ceremonies
MC	Material Control
MCNC	Microelectronics Center of North Carolina
MCN	Metropolitan Campus Network
MCPAS	Master Control Program/Advanced System, "MCP/AS"
MCP	Master Control Program
MCP	Multiport/Multiprotocol Communication Processor
MCPO	Master Chief Petty Officer
MCR	Memory ContRoller
MCS	Material Control System
MCS	Meeting Communications Service
MCSV	Mars Crew Sortie Vehicle [NASA OEXP]
MCTRAP	Mechanized Customer Trouble Report Analysis Plan
MCU	Microprocessor Control Unit
MDACS	Modular Digital Access Control System
MDAS	Magnetic Drum Auxiliary Sender
MDC	Marker Distributor Control
MDC	Meridian Digital Centrex
MD	Doctor of Medicine
MDDS	Media Documentation Distribution Set
MDE	Modular Design Environment
MDF	Main Distribution Frame [telephony]
MDI	Medium Dependent Interface
MDI	Multiple Document Interface
MDL	Molecular Design Ltd. [Corporate name]
MD	Management Domain
MD	Maryland [US state postal designation]
MD	Medical Doctor
MD	Months after Date
MDQS	Multi-Device Queueing System
MDRE	Mass Driver Reaction Engine [Space]
MDS	Multi-point Distribution Service
MDT	Mean Down Time
MDU	Marker Decoder Unit
MDX	Modular Digital eXchange
MEA	Minimum Enroute Altitude (IFR)
MEC	Mobile Equipment Console
MECO	Main Engine CutOff
MED	Master of EDucation, "MEd"
MELD	Mechanized Engineering and Layout for Distributing frames
MEM	2-MethoxyEthoxyMethyl
ME	Maine
ME	Mechanical Engineer
MEM	Maximum Entropy Method
M.E.	myalgic encephalomyelitis
MERP	Middle-Earth Role Playing
MERS	Most Economic Route Selection
MET	Mid European Time
MET	Multibutton Electronic Telephone
MeV	Million Electron Volts
MFA	Master Fine Arts
MFB	Monochrome Frame Buffer
MFENET	Magnetic Fusion Energy NETwork
MFG	Manufacturing
MFJ	Modification of Final Judgement
MFLOPS	Million FLoating-point OPerations per Second
MF	Medium Frequency (300-3000KHz)
MF	Middle French
MFM	Modified Frequency Modulation
MF	Multi-Frequency [telephony]
MFR	Multi-Frequency Receivers
MFS	Macintosh File System
MFT	Metallic Facility Terminal
MFT	Multiprogramming with a Fixed number of Tasks
MGH	Massachusetts General Hospital
MG	Machine Gun
MG	Major General
MG	MasterGroup
MG	Military Government
MGM	Metro-Goldwyn Mayer [Corporate name]
MGT	MasterGroup Translator
MGUFI	My Gosh U Freaking/Fucking Idiot
MHD	MagnetoHydroDynamics
MHL	Microprocessor Host Loader
MHS	Message Handling System (aka X.400)
MHz	MegaHertZ (unit of frequency, 1,000,000 cycles per second)
MIA	Missing In Action
MIB	Management Information Base
MICE	Modular Integrated Communications Environment
MICR	Magnetic Ink Character Recognition
MIDI	Musical Instrument Digital Interface
MIFASS	Marine Integrated Fire And Support System
MIF	Maker Interchange Format
MIL	Military
MILNET	MILitary NETwork
MILSTD	MILitary StandarD, "MIL-STD"
MIMD	Multiple Instruction, Multiple Data
MIME	Multipurpose Internet Mail Extensions
MI	Michigan
MI	Military Intelligence
MIM	Media Interface Module
MIM	Metal Insulator Metal
MIM	Morality In Media
MI	Mode Indicator
MINCE	MINCE Is Not Complete Emacs
MINDO	Modified Intermediate Neglect of Differential Overlap
MIN	Mobile Identification Number
MINX	Multimedia Information Network eXchange
MIP	Mortgage Insurance Premium
MIPS	Microprocessor without Interlocked Piped Stages
MIPS	Million Instructions Per Second
MIPS	Million of Instructions Per Second
MIR	Micro-Instruction Register
MIR	Peace, "mir" [Russian]
MIRS	Management Information Retrival System
MIRV	Multiple Independently-Targetable Reentry Vehicle
MISCF	MISCellaneous Frame
MIS	Management Information System
MITI	Ministry of International Trade and Industry
MIT	Massachusetts Institute of Technology
MITS	Microcomputer Interactive Test System
MJ	Modular Jack
MKTG	Marketing
MLA	Member of Legislative Assembly (see MPP)
MLCD	Multi-Line Call Detail
MLC	MiniLine Card
MLD	Minimum Lethal Dose
MLEM	Multi Language Environment
MLL	Mars Logistics Lander [NASA OEXP]
ML	Middle Latin
MLO	Material, Labor, Overhead - Inventoriable Cost / Full Cost
MLS	Microwave Landing System
MLS	MultiLevel Security
MLS	Multiple Listing Service
MLT	Mechanized Loop Testing
MLV	Medium Lift Vehicle [NASA OEXP]
MMC	Minicomputer Maintenance Center
MMC	Money Market Certificate
MMDF	Multi-channel Memo Distribution Facility
MMES	Martin Marietta Energy Systems
MMFS	Manufacturing Message Format Standard
MMGT	MultiMasterGroup Translator
MMH	MonoMethyl Hydrazine
M	Miniatures
MMJ	Modified Modular Jack
MM	Maryknoll Missioners
MMOC	Minicomputer Maintenance Operations Center
MMP	Modified Modular Plug
MMS	Main Memory Status
MMS	Manufacturing Message Specification
MMS	Memory Management System
MMT	Multiple Mirror Telescope
MMU	Manned Maneuvering Unit [Space]
MMU	Memory Management Unit
MMW	Multi-Mega Watt [Space]
MMX	Mastergroup MultipleX
MNA	Member of National Assembly (Quebec)
MNDO	Modified Neglect of Diatomic (differential) Overlap
MN	Minnesota
MNOS	Metal-Nitride-Oxide Semiconductor
MNP	Microcom Networking Protocol
MNRAS	Monthly Notices of the Royal Astronomical Society
MOA	Military Operations Area
MOCA	Minimum Obstacle Clearance Altitude (IFR)
MOC	Mars Observer Camera (on Mars Observer)
MODEM	MOdulator-DEModulator
MOD	Magneto-Optical Disk
MOD	Mesio Occlusal Distal (dental filling)
MOFW	Men Of Few Words
MOG	Minicomputer Operations Group
MOLA	Mars Observer Laser Altimeter (on Mars Observer)
MOL	Manned Orbiting Laboratory
MO	Magneto-Optical
MO	Mail Order
MOMA	Museum Of Modern Art
MO	Medical Officer
MO	Missouri
MOM	MethOxyMethyl
MO	Modus Operandi
MO	Molecular Orbital
MO	Money Order
MOMPL	Moment Please
MOMV	Manned Orbital Maneuvering Vehicle [Space]
MOPAC	Molecular Orbital PACkage
MOP	Maintenance Operations Protocol (DEC)
MOR	Middle-Of-the-Road
MOSFET	Metal Oxide Semiconductor Field Effect Transistor
MOS	Metal Oxide Semiconductor
MOTAS	Member of the Appropriate Sex
MOTD	Message Of The Day
MOTIS	Message-Oriented Text Interchange System
MOTOPS	Member of the Oppositely-Plumbed Sex
MOTOS	Member of the Opposite Sex
MOTSS	Member of the Same Sex
MOTV	Manned Orbital Transfer Vehicle [Space]
MOU	Memorandum Of Understanding
MOUSE	Minimum Orbital Unmanned Satellite of Earth
MOV	Metal Oxide Varistor
MPCC	Microprocessor Common Control
MPCH	Main Parallel CHannel
MPC	Minor Planets Circular
MPC	Multiprocess Communications
MPD	Multiple Personality Disorder
MPDU	Message Protocol Data Unit
MPE	Mission to Planet Earth [Space]
MPG	Miles Per Gallon
MPH	Miles Per Hour
MPIF	Multiprocessor Interface
MP	Manifold Pressure
MP	Melting Point
MP	Member of Parliament
MP	Metal Particle
MP	Metropolitan Police
MP	Micro Processor
MP	Military Police(man)
MP	Mixed Projection
MP	Modular Plug
MP	MultiProcessing
MP	MultiProcessor
MPO	Manufacturer's Point of Origin
MPOW	Multiple Purpose Operator Workstation
MPPD	Multi-Purpose Peripheral Device
MPP	Member of Provincial Parliament (Canada; also MLA)
MPP	Message Posting Protocol
MPP	Message Processing Program
MPP	MicroProcessor Pascal
MPR	Mars Pressurized Rover [Space]
MPS	Master Production Schedule
MPS	Megabytes Per Second
MPT	Ministry of Posts and Telecommunications
MPT	MultiPort Transceiver
MPU	MicroProcessor Unit
MPV	Mars Piloted Vehicle [NASA OEXP]
MPW	Macintosh Programmer's Workshop
MQC	Multiple-Quantum Coherence
MQF	Multiple-Quantum Filter
MRD	Marketing Requirements Document
MRFL	Mandatory File and Record Locking
MRF	Maintenance Reset Function
MRI	Magnetic Resonance Imaging
MR	Miniatures Rules
MRP	Manufacturing Requirements Planning
MRP	Manufacturing Resource Planning
MRP	Material Resource Planning
MRS	Material Reject Stock
MRS	Material Requirements Schedule
MRSR	Mars Rover and Sample Return
MRSRM	Mars Rover and Sample Return Mission
MRTS	Modification Request Tracking System
MRU	Most Recently Used
MSB	Most Significant Bit; Most Significant Byte
MSCDEX	MicroSoft CD-rom EXtensions
MSC	Media Stimulated Calling
MSC	MicroSoft C
MSCP	Mass Storage Control Protocol
MSD	Most Significant Digit
MSDOS	MicroSoft DOS, "MS-DOS", Maybe SomeDay an Operating System
MSE	Mobile Subscriber Equipment
MSFC	(George C.) Marshall Space Flight Center [NASA]
MSFR	Minimum Security Functionality Requirements
MSG	MonoSodium Glutamate
MSH	Marvel Super Heroes
MSI	Medium Scale Integration
MSL	Mean Sea Level
MSL	Motor Simulation Laboratory
MS	Maintenance State
MS	ManuScript
MS	Mass Spectrometry
MS	Master of Science
MS	MicroSoft [Corporate name]
MS	Military Science
MS	MilliSecond
MS	Motor Ship
MS	Multiple Sclerosis
MSN	Manhattan Street Network, mesh architecture - wavelength-division mux
MSN	Manufacturing Sequence Number
MSO	Manufacturers Statement of Ownership
MSPE	Mercenaries, Spies & Private Eyes
MSP	Mass Storage Pedestal
MSR	Mess-, Steuer- und Regelungssysteme
MSR	Multitrack Serpentine Recording
MSS	Management Support System
MSS	ManuScriptS
MSS	Mass Storage Subsystem
MSS	Mass Storage System
MSS	Maximum Segment Size
MST	Mountain Standard Time
MTA	Mail Transfer Agent
MTA	Message Transfer Agent
MTA	Message Transfer Architecture (AT&T)
MTA	Metropolitan Transportation Authority
MTBF	Mean Time Between Failures
MTBRP	Mean-Time-Between-Parts-Replacement
MTC	Man Tended Capability
MTD	Month To Date
MTFBWY	May The Force Be With You
MTF	Male to Female (transgendered)
MTF	Master Test Frame
MTF	Modulation Transfer Function
MTF	More To Follow
MTI	Multi-Terminal Interface
MT	Material Transfer
MT	Metric Ton
MTM	Method Time Measurements
MT	Mountain Time
MTP	Message Transfer Part
MTR	Magnetic Tape Recording
MTR	Mechanized Time Reporting
MTS	Message Telecommunications Service
MTS	Message Telephone Service
MTS	Mobile Telephone Service
MTSO	Mobile Telephone Switching Office [telephony]
MTTFF	Mean Time To First Failure
MTTF	Mean Time To Failure
MTTR	Mean Time to Recovery/Repair
MTTR	Mean Time Trouble Repair
MTU	Maintenance Termination Unit
MTU	Maximum Transer Unit
MTU	Maximum Transmission Unit
MTU	Media Tech Unit
MTV	Music TeleVision
MTX	Mobile Telephone eXchange
MUA	Mail User Agent
MUF	Maximum Usable Frequency (max freq during sunspot activity)
MULDEM	MULtiplexer-DEMultiplexer
MULTICS	MULTiplexed Information and Computing Service
MU	Message Unit
MUMPS	Massachusetts general hospital Utility MultiProgramming System
mung	Mash Until No Good
MUNG	Mung Until No Good (see the hacker's dictionary)
MUX	MUltipleXor
MVA	Market Value Adjustment
MVA	MegaVolt Ampere
MV	MicroVAX
MVP	Multiline Variety Package
MVS	Multiple Virtual Storage
MVSSP	Multiple Virtual Storage / System Product, "MVS/SP"
MVSXA	Multiple Virtual Storage / Extended Architecture, "MVS/XA"
MVY	Martha's Vineyard MA
MW	MicroWave, "M/W"
MWM	Motif Window Manager
MW	MultiWink
MX	Mail eXchange
MX	Missile eXperimental
MXU	MultipleXer Unit
MYOB	Mind Your Own Business
NAACP	National Association for the Advancement of Colored People
NAAFA	National Association to Advance Fat Acceptance
NAAS	North American Automated Systems co.
NABISCO	NAtional BIScuit COmpany [Corporate name]
NAB	National Association of Broadcasters
NACA	National Advisory Committee on Aeronautics (became NASA)
NAC	Network Administration Center
NACS	National Advisory Committee on Semiconductors
NADGE	NATO Air Defense Ground Environment
NAD	Network Access Device
NAD	Nicotinamide Adenine Dinucleotide
NAGE	National Association of Government Employees
NAG	Network Architecture Group
NAG	Numerical Algorithms Group
NAK	Negative AcKnowledgement
NAMM	North American Music Merchants
NAM	Name and Address Module [telephony, cellular phone changeable ROM]
NAM	National Account Manager [telephony, AT&T specific?]
NAM	Number Assignment Module [telephony, cellular phone changeable ROM]
NA	Narcotics Anonymous
NAND	Not-AND gate
NA	Next Address
NAN	Not A Number
NA	North America
NA	Not Applicable
NA	Not Available
NANP	North American Numbering Plan
NAPAP	National Acid Precipitation Assessment Program
NAPLPS	North American Presentation Layer Protocol Suite
NARDAC	NAvy Regional Data Automation Center
NAR	National Association of Realtors
NAR	Nuclear Acoustic Resonance
NASAGSFC	National Aeronautics and Space Administration Goddard Space Flight Center, "NASA/GSFC"
NASA	National Aeronautics and Space Administration
NASCAR	National Association of Stock Car Auto Racing
NASDA	National Space Development Agency [Japan]
NASDAQ	National Association of Security Dealers Automated Quotations
NASM	National Air and Space Museum
NAS	National Academy of Sciences
NAS	National Advanced Systems
NAS	National Aircraft (Aerospace) Standards
NAS	National Audubon Society
NAS	Network Application Support
NAS	Numerical Aerodynamic Simulation
NAS	Numerical and Atmospheric Sciences network
NASP	National AeroSpace Plane
NATO	North Atlantic Treaty Organization
NAU	Network Addressable Unit
NAVDAC	NAVal Data Automation Command
NAVSWC	NAV Surface Warfare/Weapons Center
NBA	National Basketball Association
NBC	National Broadcasting Company
NBD	Network Block Device (Linux)
NBD	Next Business Day
NBD	No Big Deal
NBFM	NarrowBand Frequency Modulation
NB	New Brunswick
NB	Nota Bene
NBO	Network Build Out
NBO	Network Business Opportunity
NBP	Name Binding Protocol
NBS	National Bureau of Standards (renamed NIST) [U.S. Government]
NBVM	Narrow Band Voice Modulation
NCA	Network Control Analysis
NCAR	National Center for Atmospheric Research
NCCF	Network Communications Control Facility
NCC	National Computer Conference
NCC	Network Control Center
NCDC	National Climatic Data Center
NCD	Network Computing Devices
NCE	New Catholic Edition
NCGA	National Computer Graphics Association
NCIC	National Cartographic Information Center
NCIC	National Crime Information Center
NCMOS	N-Channel (Silicon Gate Reversed) CMOS
NC	Network Control
NC	No Charge
NC	No Connection
NC	Non-Consensual
NC	North Carolina
NCO	Non-Commissioned Officer
NCP	Network Control Program/Protocol/Point
NCR	National Cash Register [Corporate name]
NCSA	National Center for Supercomputing Applications
NCSC	National Computer Security Center
NCSL	National Computer Systems Laboratory (NIST)
NCS	National Computer/Communications Systems
NCS	Network Computing System
NCTE	Network Channel-Terminating Equipment
NCTL	National Computer and Telecommunications Laboratory
NCV	No Commercial Value
NDA	Non-Disclosure Agreement
NDB	Non-Directional Beacon
NDCC	Network Data Collection Center
NDC	Normalized Device Coordinates
NDDL	Neutral Data Definition Language
NDDO	Neglect of Diatomic Differential Overlap
NDEA	National Defense Education Act
NDE	NeWS Development Environment
NDI	Network Design & Installation (Sun Service), "ND&I"
NDIS	Network Driver Interface Specification
NDL	Logical Network Disk
NDL	Network Database Language
ND	Network Disk (Sun)
ND	No Date
ND	North Dakota
NDP	New Democratic Party (Canada)
NDSL	National Direct Student Loan
NDT	Newfoundland Daylight Time
NDV	NASP Derived Vehicle
NEAR	National Electronic Accounting and Reporting system
NEARNET	New England Academic and Research network, "NEARnet"
NEB	New English Bible
NEBS	New Equipment-Building System
NEC	National Electric Code
NEC	National Electric Conference
NEC	Nippon Electric Company [Corporate name]
NEFS	Network extensible File System, "NeFS"
NEI	Not Elsewhere Included
NEMA	National Electrical Manufacturers Association
NEMP	Nuclear ElectroMagnetic Pulse
NE	New England
NE	Non Exempt
NE	North East
NESAC	National Electronic Switching Assistance Center
NESC	National Energy Software Center
NES	National Energy Strategy
NES	Not Elsewhere Specified
NETBEUI	NETBIOS Extended User Interface
NETBIOS	NETwork Basic Input Output System
NETBLT	NETwork Block Transfer
NETCDF	NETwork Common Data Format
NET	National Educational Television
NET	NETwork
NET	New England Telephone
NEWS	Networked Extensible Windowing System, "NeWS"
NEWT	NeWS Terminal, "NeWT"
NEXRAD	NEXt generation weather RADar
NEXT	Near-End cross-Talk
NFC	National Football Conference
NFC	No Fucking Clue
NFFE	National Federation of Federal Employees
NFI	no fucking idea
NFL	National Football League
NF	No Funds
NFPA	National Fire Protection Association
NFR	Not a Functional Requirement
NFR	Not Flame Related
NFS	Network File System
NFT	Network File Transfer
NFY	Not Fixed Yet
NGC	New General Catalog
NG	National Guard
NG	News Group / No Good
NG	No Good
NHI	National Health Insurance
NHLBI	National Heart, Lung, and Blood Institute (Bethesda, MD)
NHL	National Hockey League (the nation is Canada)
NH	New Hampshire
NHR	Non Hierarchial Routing
NICE	Network Information and Control Exchange (DECNET)
NICMOS	Near Infrared Camera / Multi Object Spectrometer (HST upgrade)
NIC	Network Information Center (ARPAnet)
NIC	Network Interface Card
NIFTP	(a file transfer network in the UK)
NIH	National Institutes of Health
NIH	Not Invented Here
NIMBY	Not In My Back Yard
NIMH	National Institute of Mental Health (Rockville, MD)
NIM	Nuclear Instrumentation Module (an electronic instr. standard)
NIMS	Near-Infrared Mapping Spectrometer (on Galileo)
NI	Network Interface
NIR	Near InfraRed
NIR	Network Information Registry
NISC	Network Information and Support Center (NYSERNet)
NISDN	narrowband integrated-services digital network, "N_ISDN"
NIS	Network Information Service (nee YP)
NISO	National Information Standards Organization
NISS	National Information on Software and Services
NIST	National Institute of Standards and Technology (formerly NBS)
NIU	Network Interface Unit
NJ	New Jersey
NKS	Network Knowledge Server
NLA	National Leather Association
NLDP	National Launch Development Program
NLM	National Library of Medicine
NL	National League (baseball)
NL	New Leather
NLP	Natural Language Processing
NLQ	Near Letter Quality
NLRB	National Labor Relations Board
NLS	Native Language Support
NLS	Network License Server
NMA	Network Management Architecture
NMC	Network Management Center
NMI	New Model Introduction
NMI	Non Maskable Interrupt
NM	Nautical Mile
NM	Network Module
NM	Never Mind
NM	New Mexico
NM	No Mark; Not Marked
NM	Not Much
NMOS	N channel Metal Oxide Semiconductor (N-MOS) (see MOS)
NMR	Nuclear Magnetic Resonance
NMS	Network Management Station
NNE	North North East
N	North
N	Notice
NNTP	Net News Transfer Protocol
NNTP	Network News Transfer Protocol
NNW	North North West
NNX	Network Numbering eXchange
NOAA	National Oceanic and Atmospheric Administration
NOAO	National Optical Astronomy Observatories
NOC	Network Operations Center
NOCS	Network Operations Center System
NOE	Nuclear Overhauser Effect
NOESY	Nuclear Overhauser and Exchange SpectroscopY
NOP	No OPeration
NORAD	NORth American Defense command
NORDO	No-radio
NORGEN	Network Operations Report GENerator
NORML	National Organization for the Reform of Marijuana Laws
NOSC	Naval Ocean Systems Center
NOS	Network Operating System
NOS	Not Otherwise Specified
!=	Not equal to
NOTIS	Network Operator Trouble Information System
NPA	No Power Alarm
NPA	Numbering Plan Area, or area code [Telephony]
NPC	Non-Player Character (see PC)
NPG	New Product Group
NPI	New Product Introduction
NPL	National Physical Laboratory (UK)
NPL	Non-Procedural Language
NPMS	Named Pipes/Mail Slots
NPN	Negative-Positive-Negative (transistor)
NPN	NonProtein Nitrogen
NP	Nondeterministic-Polynomial
NP	No Problem
NP	No Protest
NP	Notary Public
NP	Noun Phrase
NPP	Net Primary Productivity
NPRM	Notice of Proposed Rulemaking
NPR	National Public Radio
NPSI	Network Protocol Service Interface
NPV	Net Present Value
NQ	No Quote
NQS	Network Queuing System
NRA	National Rifle Association
NRAO	National Radio Astronomy Observatory
NRC	National Research Council
NRC	Nuclear Regulatory Commission
NRDC	Natural Resource Defense Council
NRE	New Relationship Excitement\Ecstasy
NREN	National Research and Education Network
NRE	Non-Recurring Engineering
NRL	Naval Research Labs
NRM	Normal Response Mode
NRN	No Reply Necessary
NROFF	New ROFF
NRO	National Reconnaissance Office
NRZI	Non-Return to Zero Inverted (magnetic tape, 800 bpi)
NRZ	Non-Return to Zero
NSA	National Security Agency [U.S. Government]
NSAP	Network Service Access Point
NSC	National Security Council [U.S. Government]
NSC	Network Service Center
NSCS	Network Service Center System
NSDSSO	NASA Science Data Systems Standards Office
NSEC	Network Switching Engineering Center
NSEL	Network Service Selector
NSEM	Network Software Environment
NSE	Network Software Environment
NSF	National Science Foundation [U.S. Government]
NSFNET	National Science Foundation NETwork
NSFW	Not Safe/Suitable For Work
NS	Name Server
NS	Network Services
NS	Neutron Star
NS	Not Specified
NS	Nova Scotia
NS	Nuclear Ship
NSO	National Solar Observatory
NSPMP	Network Switching Performance Measurement Plan
NSP	Network Services Protocol (DECNET)
NSSDC	National Space Science Data Center
NST	Newfoundland Standard Time
NSTS	National Space Transportation System [Space]
NSUG	Nihon Sun User's Group
NSU	Networking Support Utilities
NSWC	Naval Surface Warfare/Weapons (obsolete) Center
NSW	New South Wales (Australia)
NTEC	Network Technical Equipment Center
NTEU	National Treasury Employees Union
NTF	No Trouble Found
NTFS	Windows NT File System
NTIA	National Telecommunications and Information Agency
NTIS	National Technical Information Service
NT	Network Termination
NT	Newfoundland Time
NT	New Technology
NT	New Testament
NTN	Neutralized Twisted Nematic
NT	Northern Telecom
NT	Northern Territory
NTO	Network Terminal Option
NTP	Network Time Protocol
NTP	Normal Temperature and Pressure (see STP)
NTR	Nuclear Thermal Rocket(ry)
NTSB	National Transportation Safety Board [U.S. Government]
NTSC	National Television Standards Committee; Never The Same Color
NTS	Network Technical Support
NTS	Network Test System
NTT	New Technology Telescope
NTT	Nippon Telephone & Telegraph
NUA	Network User Address
NUI	Network User Identification
NU	Name Unknown
NURBS	NonUniform Rational B-Spline
NUSC	Naval Underwater Systems Command
NVH	Noise, Vibration, Harshness
NVLAP	National Validation Laboratory Program
NV	Nevada
NVRAM	NonVolatile Random Access Memory
NWA	Northwest Airline
NW	North West
NWS	National Weather Service
NWT	North West Territories (Australia)
NXX	NANP syntax for a three-digit string, {[2-9],[0-9],[0-9]} [Telephony]
NYC	New York City
NY	New York
NYNEX	New York, New England and the unknown (X)
NYSE	New York Stock Exchange
NYSERNET	New York State Educational and Research Network, "NYSERNet"
NZ	New Zealand
NZUSUGI	New Zealand Unix System User Group, Inc.
O2	Oxygen
OACIS	Oregon Advanced Computing InStitute
OAK	Oakland CA
OA	Office Automation
OAO	Orbiting Astronomical Observatory
OA	Order Administration
OA	Overeaters Anonymous
OAS	Organization of American States
OASYS	Office Automation SYStem
OAT	Outside Air Temperature
OATS	Office Automation Technology and Services
OBD	Online Bugs Database (Sun)
OBE	Order of the British Empire
OB	Obligatory
OBO	Or Best Offer
OBS	Omnibearing Selector
OBS	Omni Bearing Selector
OCATE	Oregon Center for Advanced Technology Education
OCC	Office Communications Cabinet
OCC	Other Common Carrier
OCDM	Office of Civil Defense and Mobilization
OCE	Other Common carrier channel Equipment
OCI	Out of City Indicator
OCLC	Online Computer Library Center (Ohio College Library Catalog)
OCLI	Optical Coating Labs Inc.
OCO	Object Code Only
OC	Operator Centralization
OC	Order of Canada
OCR	Optical Character Reader
OCR	Optical Character Recognition
OCS	Officer Candidate School
OCST	Office of Commercial Space Transportation
OCU	Office Channel Unit
ODAC	Operations Distribution Administration Center
ODA	Office Document Architecture
ODDD	Operator Direct Distance Dialing
OD	Doctor of Optometry
ODD	Operator Distance Dialing
ODIF	Office Document Interchange Format
ODI	Optical Digital Image
ODISS	Optical Digital Image Storage System
ODMR	Optically Detected Magnetic Resonance
OD	Oculus Dexter (right eye)
OD	Officer of the Day
OD	Outer Diameter
OD	OverDose
ODP	Open Distributed Processing
ODS	Overhead Data Stream
OECD	Organization for Economic Cooperation and Development
OED	Oxford English Dictionary
OEM	Original Equipment Manufacturer
OE	Old English
OEO	Office of Economic Opportunity
OE	Order Entry
OES	Order of the Eastern Star
OEXP	Office of Exploration [NASA]
OFM	Order of Friars Minor
OFNPS	Outstate Facility Network Planning System
OF	Old French
OFS	Order of Free State
OGICSE	Oregon Graduate Institute Computer Science and Engineering
OGI	Oregon Graduate Institute
OGL	Old Guard Leather
OG	Original Gum
OGT	OutGoing Trunk
OH	Ohio
OH	OverHead
OHP	OverHead Projector
OIC	Oh, I See
OIRA	Office of Information and Regulatory Affairs
OIU	Office Interface Unit
OIW	Workshop for Implementors of OSI
OJT	On-the-Job Training
OLE	Object Linking and Embedding
OLIT	Open Look Interface Toolkit
OL	Old Leather
OLTM	Optical Line Terminating Multiplexer, "O-LTM"
OLTP	OnLine Transaction Processing
OLWM	OpenLook Window Manager
OMA	Optical Multichannel Analyzer
OMB	Office of Management and Budget
OMD	Orchestral Manouevers in the Dark
OME	Oregon Microcomputer Engineering (Intel)
OMFG	Oh My F***ing God/Goodness/Gosh
OMG	Oh My Goodness/Gosh/God
OMM	Output Message Manual
OM	Office Management
OMPF	Operation and Maintenance Processor Frame
OMS	Orbital Maneuvering System
OMV	Orbital Maneuvering Vehicle [Space]
ONAC	Operations Network Administration Center
ONAL	Off Network Access Line
ONA	Open Network Architecture
ONC	Open Network Computing
ONE	Open Network Environment
ONI	Office of Naval Intelligence
ONI	Operator Number Identification [telephony]
ON	Old Norse
ONP	Optical Nuclear Polarization
ONR	Office of Naval Research
OOB	Out Of Band
OOC	Out of Character / Curiosity
OODB	Object Oriented Data Base
OOI	Out Of Interest
OOL	Out Of Luck
OO	Object Oriented
OOPART	Out Of Place ARTifact
OOPL	Object-Oriented Programming Language
OOP	Object-Oriented Programming
OOPS	Object-Oriented Programming System
OOPS	Object Oriented Program Support
OOPSTAD	Object Oriented Programming for Smalltalk Application Developers Association
OOSH	Object-Oriented SHell
OOTB	Out Of The Box
OOT	Object-Oriented Technology
OPC	Originating Point Codes
OPDU	Operation Protocol Data Units
OPEC	Organization of Petroleum Exporting Countries
OPEOS	Outside Plant planning, Engineering & construction Operations Sys
OPF	Orbiter Processing Facility
OPM	Office of Personnel Management
OPM	Outside Plant Module
OP	Observation Post
OP	OfficePower office automation system, trademark of CCI
OP	Order of Preachers
OP	Out of Print
OP	Outside Plant
OPSM	Outside Plant Subscriber Module
OPS	Off-Premises Station
OPX	Off-Premises eXtension
ORB	Office Repeater Bay
ORDLIX	Organized Design for Line and Crew System
ORD	Optical Rotatory Dispersion
ORFEUS	Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer
ORM	Optical Remote Module
ORNAME	Originator / Recipient Name, "ORname"
ORNL	Oak Ridge National Laboratory
OROM	Optical Read Only Memory
OR	Operating Room
OR	Operation Research
OR	Oregon
OR	Originating Register
OR	Owner's Risk, Own Risk
ORT	Ongoing Reliability Test
OS2	Operating System/2, "OS/2"
OSAC	Operator Services Assistance Center
OSB	Order of St. Benedict
OSCAR	Orbiting Satellite Carrying Amateur Radio
OSC	Operator Services Center
OSC	Orbital Sciences Corporation [Space]
OSC	OSCillator
OSCRL	Operating System Command Response Language
OSDIT	Office of Software Development and Information Technology
OSD	Office of the Secretary of Defense
OSDS	Operating System for Distributed Switching
OSE	Open Software Environment
OSF	Open Software Foundation (Oppose Sun Forever)
OSF	Order of St. Francis
OSHA	Occupational Safety and Health Act
OSINET	Open Systems Interconnection Network
OSI	Open Systems Interconnection
OSIRM	Open Systems Interconnection/Reference Model, "OSI/RM"
OSLT	Or Something Like That
OSME	Open Systems Message Exchange
OSN	Office Systems Node
OSN	Open Systems Network
OS	Oculus Sinister (left eye)
OSO	Originating Signaling Office
OS	Operating System
OS	Operator Service
OS	Ordinary Seaman
OS	Out of Stock
OS	OutState
OSPF	Open Shortest Path First
OSP	Optical Storage Processor
OSP	OutSide Plant
OSPS	Operator Service Position System
OSSA	Office of Space Science and Applications
OSSE	Oriented Scintillation Spectrometer Experiment (on GRO)
OSS	Office of Strategic Services (later CIA)
OSS	Office Support System
OSS	Operation Support System [telephony, AT&T?]
OSS	Operator Service System
OSTP	Office of Science and Technology Policy [White House]
OTA	Office of Technology Assessment [U.S. government]
OTA	Optical Telescope Assembly (on HST)
OTBE	OverTaken By Events
OTB	Off-Track Betting
OTBS	One True Bracketing Style
OTC	Output Technology Corporation
OTC	Over The Counter (stocks)
OTDR	Optical TDR
OTEC	Ocean Thermal Energy Conversion
OTF	Open Token Foundation
OTHB	Over The Horizon - Backscatter (as in radar), "OTH-B"
OTK	Over The Knee
OTLF	Open Taxi & Limousine Foundation, "OT&LF"
OTL	Out To Lunch
OTM	On Time Marker
OTP	On The Phone
OT	Off Topic
OTOH	On The Other Hand
OT	Old Testament
OT	OverTime
OTR	Off The Record
OTR	On The Rag
OTS	Office of Thrift Supervision
OTS	Officers' Training School
OTS	Off The Shelf
OTTOMH	Off The Top Of My Head
OTV	Orbital Transfer Vehicle [Space]
OTW	One True Way
OUTWATS	OUTward Wide Area Telephone Service [telephony]
OV	Orbiter Vehicle [Space]
OWHN	One-Word Host Name
OWTTE	Or Words To That Effect
OW	Over-Write
P2	Interpersonal Messaging Protocol (for heading and body)
P3	Protocol used by UA Entities and MTA Entities
P4	The video interface bus on the 3/80
PAA	P-AzoxyAnisole
PABX	Private Automatic Branch eXchange [telephony]
PACE	Program for Arrangement of Cables and Equipment
PAC	Privilege Attribute Certificate
PACT	Prefix Access Code Translator
PACX	Private Automatic Computer eXchange
PAD	Packet Assembler-Disassembler (for networking)
PAD	Public Access Device (networking)
PADS	PeroxylAmine DiSulfonate
PAK	Product Authorization Key
PAL	Personal Answer Line (Sun group)
PAL	Phase Alternation Line-rate
PAL	Programmable Array Logic
PAMD	Payload Assist Module, Delta-class, "PAM-D"
PAM	Payload Assist Module [Space]
PAM	Pulse Amplification Modulation
PAM	Pulse-Amplitude Modulation
PAN	Personal Account Number
PANS	Pretty Advanced New Stuff
PAO	Palo Alto CA
Pa	Pascal
PA	Pennsylvania
PA	Per Annum
PA	Play Aid
PA	Power Alarm
PA	Power of Attorney
PAP	Printer Access Protocol
PA	Precision Architecture (HP)
PA	Press Agent
PA	Private Account
PA	Process Alert
PA	Program Address
PA	protactinium, "Pa"
PA	Public Address
PA	Purchasing Agent
PARC	Palo Alto Research Center, xerox
PAR	Peak-to-Average Ratio, "P/AR"
PAR	Precision Approach Radar
PAR	Project Authorization Request
PAS	Public Announcement Service
PAT	Power Alarm Test
PAT	Profit After Tax
PATROL	Program for Administrative Traffic Reports On Line
PAX	Private Automatic eXchange
PBC	Peripheral Bus Computer
PBC	Processor Bus Controller
PBD	Pacific Bell Directory
PBM	Play By Mail game
PBM	Portable BitMap file format
PBS	Public Broadcasting System
PBT	Profit Before TAX
PBX	Private Branch eXchange [telephony]
PCA	Positive Controlled Airspace (above 18,000')
PCA	Printed-Circuit Assembly
PCAT	Personal Computer/Advanced Technology, "PC/AT"
PCB	PolyChlorinated Biphenyls
PCB	Printed Circuit Board
PCB	Process Control Block
PCB	Protocol Control Block (TCP)
PCC	Portable C Compiler
PCDA	Program Controlled Data Acquisition
PCDOS	Personal Computer DOS, "PC-DOS"
PCF	Portable Compiled Font
PCF	Puritanical Control Freaks
P	(Chem.) para-, "p-"
PCH	Parallel CHannel
PCIE	President's Council on Integrity and Efficiency
PCILO	Perturbational Configuration Interaction of Localized Orbitals
PCI	Panel Call Indicator
PCI	Peripheral Components Interface
PCI	Protocol Control Information
PCL	Printer Command Language
PCL	Programmable Command Language
PCM	Plug-Compatible Mainframe
PCM	Pulse-Code Modulation
PCNFS	Personal Computer Network File System
PCN	Personal Communication Network
PCO	Peg Count and Overflow
PCO	Process Change Order
PCPC	Personal Computers Peripheral Corporation
PC	Peace Corps
PC	PerCent/PerCentage
PC	Personal Computer
PC	Piece of Crap
PC	Player Character (see NPC)
PC	Politically Correct
PC	Post Card
PC	Post Cibum (after meals)
PC	Primary Center
PC	Printed Circuit
PC	Privileged Character
PC	Privy Council
PC	Production Control
PC	Program Counter
PC	Progressive Conservative party (Canada)
PCSA	Personal Computer Systems Architecture
PCS	Patchable Control Store
PCS	Permanent Change of Station
PCTE	Portable Common Tools Environment
PCTS	Posix Conformance Test Suite
PCTV	Program Controlled TransVerters
PDAD	Proposed Draft ADdendum
PDA	Public Displays of Affection
PDB	Process DataBase
PDE	Partial Differential Equation
PDES	Product Data Exchange Specifications
PDF	Power Distribution Frame
PDF	Program Development Facility
PDIF	Product Definition Interchange Format
PDI	Power and Data Interface
PDL	Page Description Language
PDL	Page/Program Description/Design Language
PDL	Program Design Language
PDN	Public Data Network
PD	Per Diem
PD	Peripheral Decoder
PD	Police Department
PD	Potential Difference
PDP	Plasma Display Panel
PDP	Programmed Data Processor [DEC]
PD	Public Domain
PDQ	Pretty Damned Quick
PDS	Portable Display Shell
PDSP	Peripheral Data Storage Processor
PDS	Premises Distribution System (AT&T)
PDS	Public Domain Software
PDT	Pacific Daylight Time
PDU	Product Development Unit
PDU	Protocol Data Unit
PEBCAK	Problem Exists Between Chair and Keyboard
PEBCAK	Problematic Error Between the Chair and Keyboard
PECC	Product Engineering Control Center
PEDRI	Proton-Electron Double-Resonance Imaging
PEI	Prince Edward Island
PEM	Privacy Enhanced Mail
PEPE	Pepe Est Presque Emacs
PE	Peripheral Equipment
PE	Phase Encoded (1600 bpi)
PE	Physical Education
PE	PolyEthylene
PEP	Packetized Ensemble Protocol
PEP	Productivity Enhancement Project
PE	Prince Edward island
PE	Printer's Error
PE	Professional Engineer
PE	Protestant Episcopal
PERFECT	PERFormance Evaluation for Cost-Effective Transformations
PERL	Pathologically Eclectic Rubbish Lister
PERL	Practical Extraction and Report Language
PERT	Program Evalution and Review Technique
PES	PhotoElectron Spectroscopy
PETA	People for the Ethical Treatment of Animals
PEX	Phigs/phigs+ Extension to X
PEXSI	PEX Sample Implementation (gfx), "PEX-SI"
PFB	Printer Font Binary
PFC	Power Factor Correction
PF	Programmed Function
PFPU	Processor Frame Power Unit
PGA	Pin Grid Array
PGA	Professional Graphics Adapter
PGA	Pure Grain Alcohol
PG	Perge Notice
PHA	Pulse Height Analyzer/Analysis
PHIGS	Programmer's Hierarchical Interactive Graphics System
PHOTOCD	PHOTOgraphic Compact Disk
PH	Parity High bit
PH	Potential of Hydrogen, "pH"
PH	Process Hold
PHS	Public Health Service
PHYSREV	Physical Review Journal, "PhysRev"
PIA	Plug-In Administrator
PIBCAK	Problem Is Between Chair And Keyboard
PIC	Pilot In Command
PIC	Plastic-Insulated Cable
PIC	Primary Independent Carrier
PICNIC	Problem In Chair Not In Computer
PICS	Plug-in Inventory Control System (PICS/DCPR)
PID	Process IDentifier
PID	Protocol IDentifier
PIF	Paid In Full
PIF	Program Information File
PIMS	Profit Impact of Marketing Strategy
PINE	Pine Is Not Elm
PING	Packet InterNet Groper
PIN	Personal Identification Number
PIP	Packet Interface Port
PIP	Periphal Interchange Program
PI	Principal Investigator
PI	Protocol Interpreter
PISS	Passive Ignorance Silence Strike
PITA	Pain In The Ass
PITI	Principal, Interest, Taxes, Insurance
PIT	Principal, Interest, and Taxes
PIXEL	PIcture ELement
PL1	Programming Language One, "PL/1"
PLAN	Public Lands Action Network
PLA	Programmable Logic Array
PLCC	Plastic Leaded Chip Carrier
PLC	Programmable Logic Controller
PLD	Programmable Logic Device
PLL	Phase-Locked Loop
PLM	Programming Language for Microcomputers
PLMK	Please Let Me Know
PLO	Palestine Liberation Organization
PLO	Please Leave On
PL	Parity Low bit
PLS	Physical Layer Signaling
PLSS	Portable Life Support System
PLT	Panduit Locking Tie
PMAC	Peripheral Module Access Controller
PMA	Physical Medium Attachment
PMC	Permanently Manned Capability
PMDF	Pascal Memo Distribution Facility
PMEG	Page Map Entry Group
PMFJI,	PMJI    Pardon Me (For) Jumping In
PMG	Page Map Group
PMIRR	Pressure Modulated InfraRed Radiometer (on Mars Observer)
PMMU	Paged Memory Management Unit
PMO	Prime Minister's Office
PMOS	P channel Metal Oxide Semiconductor (P-MOS) (see MOS)
PM	PayMaster
PM	Peripheral Module
PM	Phase Modulation
PM	Plant Management
PM	Police Magistrate
P&M	Posted & Mailed
PM	PostMaster
PM	Post Meridiem (after noon)
PM	PostMortem
PM	Presentation Manager
PM	Pressurized Module
PM	Preventive Maintenance
PM	Prime Minister
PM	Provost Marshal
PMRC	Parents' Music Resource Center
PMSL	Pissed MySelf Laughing
PMT	PhotoMultiplier Tube
PMU	Precision Measurement Unit
PMX	Presentation Manager for the X window system, "PM/X"
PNB	Pacific Northwest Bell
PN	Part Number
PNPN	Positive-Negative-Positive-Negative devices
PNP	Plug N Play
PNP	Positive-Negative-Positive (transistor)
PN	Promissory Note
POA	Power Of Attorney
POB	Periphal Order Buffer
POC	Port Of Call
POD	Pay On Delivery
POD	Point Of Distribution
POE	Port Of Entry/Embarkation
POF	Programmable Operator Facility
POGO	Polar Orbiting Geophysical Observatory
POH	Pilot's Operating Handbook
POK	Power on Okey Signal
POM	Phase Of Moon
PO	Petty Officer
PO	Postal Order
PO	Post Office
POP	Point of Presence [telephony]
POP	Point Of Production
POP	Post Office Protocol
POP	Processor On Plug-in (h/w)
POPS	Paperless Order Processing System
PO	Purchase Order
POR	Point Of Receive
POR	Price On Request
POSI	Promoting conference for OSI
POSIX	Portable Operating System for unIX
POS	Point Of Sale
POS	Programmable Option Set
POST	Power On Self Test
POSYBL	PrOgramming SYstem for distriButed appLications
POTS	Plain Old Telephone Service
POTS	Plain Ordinary Telephone System
POTV	Personnel Orbit Transfer Vehicle [Space]
POV	Point Of View
POWER	Performance Optimization With Enhanced Risc
POW	Prisoner Of War
P	page, "p."
PPA	Post Pack Audit
PPB	Parts Per Billion
PPBS	Planning, Programming, and Budgeting Systems
PPC	Pour Prendre Conge' (to take leave)
PPCS	Person to Person, Collect, Special [telephony]
PPD	Peripheral Pulse Distributor
PPD	PostScript Printer Description
P	per (as in m.p.h.), "p."
P	peta- (SI prefix)
P	phosphorus, "P"
P	pico- (SI prefix), "p"
PPI	Professional Press Inc.
PPI	Programmable Peripheral Interface
PPL	pretty please
PPM	Page Per Minute
PPM	Parts Per Million
PPM	Portable PixMap file format
PPM	Product Portfolio Management
PPN	Parameterized Post-Newtonian formalism for general relativity
PPN	Project Programmer Number
PPN	Public Packet Switching
PP	pages, "pp."
PP	Painting Processor
PP	Parcel Post
PP	Past Participle
PP	Post Pay
PPP	Point-to-Point Protocol
PP	Primary Point
PP	Private Pilot
PPS	PostPostScriptum
PPS	Product Performance Surveys
PPS	ProduktionsPlanungs- und Steuerungssysteme
PPS	Public Packet Switching network
PPT	Parts Per Trillion
PPT	Pulse Pair Timing
PPT	Punched Paper Tape
PQ	Province of Quebec
PRCA	Puerto Rico Communications Authority
PRC	People's Republic of China
PRC	Planning Research Corporation
PREMIS	PREMises Information System
PREPNET	Pennsylvania Research & Economic Partnership network, "PREPnet"
PRG	PAL/PROM Programming Department
PRI	Primary Rate Interface
PRISM	Parallel Reduced Instruction Set Multiprocessing
PRMD	Private Management Domain
PROFS	PRofessional OFfice System
PROLOG	PROgramming in LOGic
PROMATS	PROgrammable Magnetic Tape System
PROM	Programmable Read-Only Memory
PROPAL	Programmed PAL
PROTEL	PRocedure Oriented Type Enforcing Language
PROXYL	tetramethyl-PyRrolidine-OXYL
PR	PayRoll
PR	Public Relations
PR	Puerto Rico
PRS	Personal Response System
PRTC	Puerto Rico Telephone Company
PSAP	Public Safety Answering Point
PSA	Problem Statement Analyzer
PSA	Public Service Announcement
PSC	Pittsburgh Supercomputer Center
PSC	Polar Stratospheric Clouds
PSC	Prime Service Contractor
PSC	Public Safety Calling system
PSC	Public Service Commission
PSDC	Public Switched Digital Capability
PSDN	Packet-Switched Data Network
PSDS	Public Switched Digital Service
PSDS	Public Switched Digital Service [telephony, AT&T?]
PSE	Packet Switch Exchange
PSE	Programming Support Environment
PSF	Point Spread Function
PSG	Platoon SerGeant
PSG	Professional Service Group (Sun group)
PSI	Packetnet System Interface
PSI	Packet Switch Interface
PSIU	Packet Switch Interface Unit
PSK	Phase-Shift Keying
PSL	Problem Statement Language
PSM	Packet Service Module
PSM	Position Switching Module
PSM	Professional Service Manager
PSN	Packet Switched Network
PSN	Packet Switching Node
PSN	Packet Switch Node
PSO	Pending Service Order
PS	PicoSecond
PS	PostScript
PS	PostScript [Adobe (tm)]
PS	PostScriptum
PS	Power Steering
PS	Power Supply
PSP	Product Support Plan
PSP	Program Segment Prefix
PS	Process Stop Ship
PS	Program Store
PS	Public School
PSR	Product Specific Realizations
PSR	Product Specific Release
PSR	PulSaR
PSS	Packet Switched Services
PSS	Packet Switch Stream
PSTN	Public Switched Telephone Network
PST	Pacific Standard Time
PSU	Program Storage Unit
PSWM	PostScript Window Manager
PSW	Program Status Word
PTA	Parent-Teacher Association
PTAT	Private Trans Atlantic Telecommunications
PTD	Parallel Transfer Disk/Drive
PTE	Page Table Entry
PTI	Portable Test Instrument
PTN	Plant Test Number [telephony:actual number assigned for 800 service]
PTO	Patent and Trademark Office
PTO	Please Turn Over
PTO	Power Take-Off
PT	Pacific Time
PT	Patrol Torpedo (as in PT boat)
PT	Physical Therapy
PT	Physical Training
PTP	Point To Point
PT	Program Timer
PTSD	Post Traumatic-Stress Disorder
PTSS/PTSD	Post Traumatic Stress Syndrome / Disorder
PTT	Postal, Telephone, and Telegraph administration
PTT	Post, Telephone and Telegraph administration
PTV	Passenger Transport Vehicle [Space]
PTW	Primary Translation Word
PTY	Pseudo-Terminal driver
PUC	Peripheral Unit Controller
PUC	Public Utilities Commission
PUD	Planned Unit Development
P	(UK) pence, pennies, penny, "p"
PU	Physical Unit
PUP	PARC Universal Packet protocol
PVC	Permanent Virtual Circuits
PVC	PolyVinylChloride
PVFS	Post Viral Fatigue Syndrome
PVN	Private Virtual Network
PVO	Pioneer Venus Orbiter
PV	PhotoVoltaic
PVT	Private (pilot certificate)
PWB	Printed Wiring Board
PWB	Programmers Work Bench
PWD	Print Working Directory
PWG	Permanent Working Group
PW	Prisoner of War (usually POW)
PX	Post eXchange (see also BX)
QAM	Quadrature Amplitude Modulation
QA	Quality Assurance
QAS	Quasi-Associated Signaling
QBE	Query By Example
QBP	Queen's Bishop's Pawn (chess)
QB	Queen's Bishop (chess)
QCPE	Quantum Chemistry Program Exchange
QC	Quality Control
QC	Queen's Counsel
QDA	Quantity Discount Agreement
QDCS	Quality, Deliverly, Cost, Service / Safety
QD	Quaque Die (daily)
QED	Quantum ElectroDynamics
QED	Quod Erat Demonstrandum (which was to be demonstrated)
QED	Quod Est Demonstrandum (that which was to be demonstrated)
QEF	Quod Erat Faciendum (which was to be done)
QEI	Quod Erat Inveniendum (which was to be found out)
QE	Quick Estimation
QET	Quantum Effect Transistor
QIC	Quarter-Inch Cartridge
QID	Quater In Die (four times a day)
QIS	Quality Information System
QKtP	queen's knights's pawn (chess)
QKt	queen's knight (chess)
QLI	Query Language Interpreter
QMC	QuarterMaster Corps
QMF	Query Management Facility
QMG	QuarterMaster General
QMP	Quality Measurement Plan
QM	QuarterMaster
QMS	Quality Micro Systems
QNS	Quantity Not Sufficient
Q	Queen('s), "Q."
Q	question, "Q."
QQV	which see (plural of q.v.), "qq.v."
QRA	Quality Reliability Assurance
QRSS	Quasi Random Signal Source
QSO	Quasi-Stellar Object
QSS	Quality Surveillance System
QTC	Quantitative Technology Corporation
QTY	Quantity
QUANGO	QUAsi Non-Governmental Organization
QUANTAS	Quantas Empire Airways
QUANTAS	QUeensland And Northern Territory Aerial Service, "Quantas"
QUEL	QUEry Language
QV	which see (sing.), "q.v."
QWERTY	first six keys from left on top alphabetic row of standard keyboard
QWL	Quality of Working Life
RAAF	Royal Australian Air Force
RACEP	Random Access and Correlation for Extended Performance
RACE	Random Access Card Equipment
RADAR	Radio Association Defending Airwave Rights (radar detector makers)
RADAR	RAdio Detection And Ranging
RADM	Rear ADMiral
RAD	Radiation Absorbed Dose
RAD	Rapid Access Disk
RAF	Royal Air Force
RAID	Redundant Arrays of Inexpensive Disks
RAMP	Ratings And Maintenance Phase
RAM	Random-Access Memory
RAND	Rural Area Network Design
RAO	Regional Accounting Office
RAO	Revenue Accounting Office
RA	radium, "Ra"
RARDE	Royal Armaments Research and Development Establishment
RARE	European Association of Research Networks
RA	Regular Army
RARE	Reseaux Associes pour la Recherche Europeenne
RA	Research Assistant
RA	Return Authorization
RA	Royal Academy
RARP	Reverse Address Resolution Protocol (Ethernet->Internet)
RAR	Return Address Register
RASC	Residence Account Service Center
RAS	Reliability, Availability, and Serviceability
RATFOR	RATional FORtran
RBC	Red Blood Count
RBHC	Regional Bell Holding Company
RBI	Runs Batted In
RBOC	Regional Bell Operating Company
RBOR	Request Basic Output Report
RB	Rhythm and Blues, "R&B"
RBTL	Read Between The Lines
RBT	Reliable Broadcast Toolkit
RCAF	Royal Canadian Air Force
RCA	Radio Corporation of America
RCAS	Reserve Component Automation System
RCC	Radio Common Carrier
RCC	Remote Cluster Controller
RCC	Reverse Command Channel
RCF	Remote Call Forwarding
RCI	Rodent Cage Interface (for SLS mission)
RCLDN	Retrieval of Calling Line Directory Number
RCL	Runtime Control Library
RCMAC	Recent Change Memory Administration Center
RCMP	Royal Canadian Mounted Police
RCM	Remote Carrier Module
RCP	Remote CoPy
RC	Receive Clock
RC	Red Cross
RC	Regional Center
RC	Repair Center (Sun)
RC	Resistance-Capacitance
RC	Resistor-Capacitor circuit (as in filters)
RC	Roman Catholic
RC	Run Commands
RCSC	Remote Spooling Communications Subsystem
RCS	Reaction Control System
RCS	Revision Control System
RCT	Relayed Coherence Transfer
RCU	Radio Channel Unit
RCVR	ReCeiVeR
RDA	Remote Data Access
RDBMS	Relational DataBase Management System
RDES	Remote Data Entry System
RDF	Radio Direction Finding
RDL	Remote Digital Loopback
RDM	Reliably-Delivered Message (sockets)
RDP	Reliable Datagram Protocol
RD	Received Data
RD	Research and Development, "R&D"
RD	Rural Delivery
RDS	Radio Digital System
RDT	Radio Digital Terminal
REA	Rail Express Agency
RECON	Reconnaissance
REC	Regional Engineering Center
REGIS	REmote Graphics Instruction Set
REMOBS	REMote OBservation System
REM	Rapid Eye Movement
REM	Rat Enclosure Module (for SLS mission)
REM	Rational Economic Man
REM	Remote Equipment Module
REM	Ring Error Monitor
REM	Roentgen Equivalent in Man
REN	Ring Equivalence Number
REO	Removable, Erasable, Optical
REO	R. E. Olds
REQSPEC	REQuirements SPECification
RETMA	Radio Electronics Television Manufacturers Association (rack spacing)
REX	Raster Engine
REX	Remote EXecution
REXX	Restructured EXtended eXecutor
RFC	Request For Comments [Internet]
RFD	Rural Free Delivery
RFE	Request For Enhancement
RFI	Radio Frequency Interference
RFP	Request For Proposals
RFQ	Request For Quotes
RF	Radio Frequency
RFS	Remote File Sharing
RFS	Remote File System
RFT	Request For Technology
RGBI	Red Green Blue Intensity
RGB	Red Green Blue
RGP	Raster Graphics Processor
RGU	Radio Government/Universal, "RG/U"
RHC	Regional (Bell) Holding Company
RHF	Restricted Hartree-Fock
RH	Right Hand
RHS	Right Hand Side
RHV	Reid-Hillview Intergalactic, San Jose CA
RIACS	Research Institute for Advanced Computer Science (at NASA Ames)
RIAS	Radio In the American Sector, berlin
RID	Remote Isolation Device
RIFF	Resource Interchange File Format
RIF	Reading Is Fundamental
RIF	Reduction In Force
RILM	Repertoire International de Literature Musicale
RIPE	Reseaux IP Europeenne
RIP	Raster Image Processor
RIP	Rest In Peace/Requiescat In Pace
RIP	Routing Information Protocol
RIPS	Raster Image Processing Systems Corp.
RI	Receiving & Inspection, "R&I"
RI	Rhode Island
RI	Ring Indicator
RISC	Reduced Instruction Set Computer
RISC	Relegate Important Stuff to the Compiler
RISLU	Remote Integrated Services Line Unit
RITA	Recognition of Information Technology Achievement award
RIT	Rochester Institute of Technology
RJE	Remote Job Entry [IBM]
RLCM	Remote Line Concentrating Module
RLC	Resistor Inductor Capacitor
RLDS	The Re-organized Church of Latter-Day Saints
RLG	Research Libraries Group
RLIN	Research Libraries Information Network [run by RLG (q.v.)]
RLL	Run Length Limited
RLOGIN	Remote Login, "rlogin"
RL	Real Life (sometimes written as r/l)
RLT	Remote Line Test
RMA	Return Materials Authorization
RMAS	Remote Memory Administration System
RMATS	Remote Maintenance Admisistration and Traffic System [telephony]
RMF	Read Me First
RMI	Radio Magnetic Indicator
RM	Record Marking
RM	Regional Manager
RMR	Remote Message Registers
RMR	Return Material Receipt
RMS	Record Management System
RMS	Remote Manipulator System [Space]
RMS	Richard M. Stallman
RMS	Root Mean Square
RMS	Royal Mail Ship
RNA	RiboNucleic Acid
RNGC	Revised New General Catalog
RNOC	Regional Network Operations Center
RN	Reference Noise
RN	Registered Nurse
RN	Royal Navy
RNR	Receive Not Ready
RNZAF	Royal New Zealand Air Force
ROA	Return On Assets
ROB	Remote Order Buffer
ROC	Regional Operating Company
ROE	Rate Of Exchange
ROE	Return On Equity
ROFF	Run-OFF
ROFL	Rolling On the Floor Laughing (there are variations)
ROG	Receipt Of Goods
ROH	Receiver Off Hook
ROI	Region Of Interest
ROI	Return On Investment
ROM	Range Of Motion (medical)
ROM	Read-Only Memory
ROM	Rupture Of Membrane (as in birth)
RONABIT	Return On Asset Before Income Tax
RONA	Return on Net Assets
RO	Read/Only, "R/O"
RO	Receive Only
ROSAT	ROentgen SATellite
ROSE	Remote Operations Service Element
ROTC	Reserve Officers' Training Corps
ROTFL	Rolling On The Floor Laughing
ROTFLMAO	Rolling On The Floor Laughing My Ass/Arse Off
ROTFLMAOGCB	Rolling On The Floor Laughing My Ass/Arse Off Getting Carpet Burns
ROTFLOL	Rolling On The Floor Laughing Out Loud
ROTF	Rolling On The Floor (Usually seen as ROFL)
ROTL	Remote Office Test Line
ROTS	Rotary Out Trunks Selectors
ROUS	Rodents Of Unusual Size
ROW	Rest Of the World
ROYGBIV	Red, Orange, Yellow, Green, Blue, Indigo, Violet, "Roy G. Biv"
RPC	Remote Procedure Call
RPG	RePort Generator
RPG	Role Playing Game
RPI	Rolling Plan Indices
RPM	Remote Process Management
RPM	Removable Peripheral Module
RPM	Resales Price Maintenance
RPM	Revolutions Per Minute
RPN	Reverse Polish Notation
RPO	Railway Post Office
RP	Rolling Plan
RPS	Revolutions Per Second
RPS	Rotational Positional Sensing (disks)
RPV	Remotely Piloted Vehicle
RQ	RuneQuest
RQSM	Regional Quality Service Management
RQS	Rate/Quote System
R	rand
R	recto, "r."
R	Republican, "R."
R	right, "r"
R	Ring
RRIP	Rock Ridge Interchange Protocol
R	roentgen
R	Rolemaster
R	rook in chess
RRO	Rate and Route Operator [telephony]
RRO	Reports Receiving Office
RR	RailRoad
RR	Rate & Route, "R&R"
RR	Receive Ready
RR	Resource Record
RR	Route Relay
RR	Rural Route
RS232	Digital Communication Standard, "RS-232"
RSA	Repair Service Attendant
RSB	Repair Service Bureau
RSC	Remote Switching Center
RSC	Residence Service Center
RSCS	Remote Source Control System
RSCS	Remote Spooling and Communication Subsystem
RSE	Research & Systems Engineering, "R&SE"
RSFSR	Russian Soviet Federated Socialist Republic
RSH	Remote/Restricted SHell
RSLE	Remote Subscriber Line Equipment
RSLM	Remote Subscriber Line Module
RSM	Remote Switching Module
RSN	Real Soon Now
RS	Recommended Standard
RS	Recording Secretary
RS	Revised Status
RS	Right Side
RS	RISC System
RS	Royal Society
RSS	Really Simple Syndication
RSS	Remote Switching System
RSTSE	Resource System Time Sharing/Enhanced, "RSTS/E"
RSTS	Resource System Time Sharing
RSU	Remote Switching Unit
RSVP	Repondez S'il Vous Plait (please reply)
RSV	Revised Standard Edition
RSWC	Right Side up With Care
RTAC	Regional Technical Assistance Center [telephony]
RTA	Remote Trunk Arrangement
RTC	Right To Copy
RTFB	Read The Fine Book
RTFMP	Read The Fine Man Page
RTFM	Read The Fine/F***ing Manual
RTF	Read This First
RTF	Rich Text Format
RTFS	Read The Fine Source
RTG	Radioisotope Thermoelectric Generator
RTL	Resistor-Transistor Logic
RTL	Run-Time Library
RTLS	Return To Launch Site (Shuttle abort plan)
RTMP	Routing Table Maintenance Protocol
RTM	Regional Telecommunications Management
RTM	Release To Manufacturing
RTM	Remote Test Module
RT	RadioTelephone
RT	RealTime
RT	Real-Time/Rise Time/Radiation Therapy/RighT (as opposed to Left)
RT	Risc Technology [IBM]
RTR	Reel-To-Reel
RTSE	Reliable Transfer Service Element
RTSL	Read The Source Luke
RTS	Ready To Send
RTS	Real Time Systems (lll-csrg)
RTS	Reliable Transfer Service
RTS	Remote Testing System
RTS	Return To Stock
RTT	Round Trip Time
RTTY	Radio Teletype
RTU	Real Time Unix
RTU	Remote Trunking Unit
RTU	Right To Use
RUM	Remote User Multiplex
RUOK	Are you OK?
RU	Receive Unit
RWC	Remote Work Center
RWE	Remote Wall Enclosure
RWM	Read/Write Memory, "R/WM"
RW	Read/Write
RW	Read/Write, "R/W"
RW	Real World
RW	Right Worshipful
RW	Right Worthy
RX	Remote eXchange
SAAB	Svenska Aeroplan AktieBolaget (Swedish Aircraft Corporation)
SAA	South Atlantic Anomaly
SAA	Systems Application Architecture (IBM)
SABME	Set Asynchronous Balanced Mode Extended
SABRE	Semi-Automated Business Research Environment
SACK	Selective ACK
SAC	Service Area Code
SAC	Strategic Air Command [US military]
SADD	Students Against Drunk Driving
SAE	Society of Automotive Engineers
SAGA	Solar Array Gain Augmentation (for HST)
SAG	Street Address Guide
SAIC	Science Applications International Corporation
SAI	Serving Area Interface
SAKDC	Swiss Army Knife Data Compression
SALI	Standalone Automatic Location Identification
SALT	Strategic Arms Limitting Talks
SAMA	Step-by-step Automatic Message Accounting [telephony]
SAMPEX	Solar Anomalous and Magnetospheric Particle EXplorer
SAM	Smart Assed Masochist / Stand And Model
SAM	Surface-to-Air Missile
SAMTO	Space And Missile Test Organization
SAO	Smithsonian Astrophysical Observatory
SAP	Second Audio Program
SAP	Service Access Point
SARA	Satellite pour Astronomie Radio Amateur
SAREX	Search and Rescue Exercise
SAREX	Shuttle Amateur Radio Experiment
SAR	Search And Rescue
SAR	Store Address Register
SAR	Synthetic Aperture Radar
SARTS	Switched Access Remote Test System
SA	Salvation Army
SA	Seaman Apprentice
SA	Service Assistant
SASE	Self-Addressed Stamped Envelope
SASE	Specific Application Service Element
SA	Sex Appeal
SA	Sine Anno (without date)
SASI	Shugart Associates Systems Interface
SA	South Africa
SA	South America
SA	South Australia
SAS	Single Attach Station
SAS	Southern All Stars
SAS	Space Activity Suit
SAS	Space Adaptation Syndrome
SAS	Statistical Analysis Software?
SA	Subject to Approval
SAT	Satellite [Space]
SAT	Scholastic Aptitude Test
SAT	Special Access Termination
SAT	Supervisory Audio Tone
SAT	Synthetic Aperture Telescope
SAW	Surface Acoustic Wave
SBA	Small Business Administration
SBC	Single Board Computer
SBMS	Southwestern Bell Mobile Service
SBS	Skyline Business Systems
SBUS	School Bus, "S-Bus"
SBU	Strategic Business Unit
SBWR	Simplified Boiling Water Reactor
SCADA	Supervisory Control And Data Acquisition
SCADC	Standard Central Air Data Computer
SCAD	Subsonic Cruise Armed Decoy
SCAME	SCreen oriented Anti-Misery Editor
SCAMP	Single-Chip A-series Mainframe Processor
SCAN	Switched Circuit Automatic Network
SCA	Shuttle Carrier Aircraft
SCA	Society for Createive Anachronism
SCA	Sunlink Channel Adapter
SCAT	Stromberg-Carlson Assistance Team
SCB	System Control Block
SCCA	Sports Car Club of America
SCC	Serial Communication Controller
SCC	Specialized Common Carrier
SCCS	Source Code Control System
SCCS	Specialized Common Carrier Service
SCCS	Switching Control Center System
SCC	Switching Control Center (or Specialized Common Carriers)
SCED	SCSI/Ethernet/Diagnostics (Sequent board)
SCE	Signal Conversion Equipment
SCE	Structure Chart Editor
SCF	Selective Call Forwarding
SCF	Self Consistent Field
s.c.f.t.h.i.	Smiley Captiond for the Humor-Impaired
SCIFI	SCIence FIction, "sci-fi"
SCI	SpaceCraft Incorporated
SCM	Software Configuration Management
SCMS	Serial Copy Management System
SCM	Subscriber Carrier Module
SCNR	Sorry, Could Not Resist
SCOOPS	SCheme Object Oriented Programming System
SCO	Santa Cruz Operation
SCO	Serving Central Office
SCOTS	Surveilance and Control Of Transmission Systems
SCOT	Stepper Central Office Tester
SCPC	Signal Channel Per Carrier
SCPD	Supplementary Central Pulse Distributor
SCPI	Standard Commands for Programmable Instrumentation
SCP	Secure CoPy (from the SSH suite)
SCP	Signal Control Point
SCP	Signal Conversion Point
SCP	Sunlink Communications Processor
SCP	System Control Program
SCRAM	Static Column RAM (h/w)
SCSA	Sun Common SCSI Architecture
SC	Scanner Controller
SC	Secondary Channel
SC	Sectional Center
SCSI	Small Computer System Interface (pronounced scuzzi)
SC	Skull & Crossbones, "S&C"
SC	South Carolina
SC	SpaceCraft, "S/C"
SCS	Silicon Controlled Switch
SC	SubCommittee
SCT	Schmidt-Cassegrain Telescope
SCTS	Secondary Clear To Send
SCUBA	Self Contained Underwater Breathing Apparatus
SCUD	Subsonic Cruise Unarmed Decoy
SCU	Selector Control Unit
SCX	Specialized Communications eXchange
SDA	Send Data With Immediated Ackonwledge
SDA	Swappable Data Area
SDB	Safety Deposit Box
SDCD	Secondary Data Carrier Detect
SDD	Specific Development & Design, "SD&D"
SDF	Secondary Distribution Frame
SDF	Standard Data Format
SDF	SubDistribution Frame
SDH	Synchronous Digital Hierarchy (synchronous multiplexed network)
SDIO	Strategic Defense Initiative Organization
SDI	Selective Dissemination of Information
SDI	Space Defense Initiative
SDIS	Switched Digital Integrated Service
SDI	Standard Disk Interconnect
SDI	Standard Disk Interface
SDI	Storage Device Interconnect
SDI	Strategic Defense Initiative [US Government]
SDK	Software Development Kit
SDLC	Synchronous Data Link Control [IBM]
SDLP	Standard Device Level Protocol
SDL	Specification and Description Language
SDL	System Design Language
SDM	Sub-rate Data Multiplexer
SDN	Software-Defined Network
SDOC	Selective Dynamic Overload Controls
SDO	Staff Duty Officer
SDP	Service Delivery Point
SDRC	Structural Dynamics Research Corporation
SDR	Store Data Register
SDSC	San Diego Supercomputer Center
SD	SCSI Disk
SDSC	Synchronous Data Set Controller
SD	Sensory Deprivation
SD	South Dakota
SDS	Sodium Dodecyl Sulfate
SDS	Switched Data Service
SDS	Synchronous Data Set
SDU	Service Data Unit
SDV	Shuttle Derived Vehicle [Space]
SEAP	Service Element Access Point
SEAS	Signaling Engineering and Administration System
SEATO	SouthEast Asia Treaty Organization
SECAM	SEquential Couleur Avec Memoire
SECNAV	SECretary of the NAVy
SEC	Securities and Exchange Commission
SEC	Security Exchange Commission
SECSY	Spin-Echo Correlated SpectroscopY
SED	Stream EDitor
SEI	Software Engineering Institute (Carnegie Mellon)
SEI	Space Exploration Initiative
SEL	SELector
SEL	Software Engineering Laboratory
SELV	Safety Extra-Low Voltage
SEM	Scanning Electron Microscope
SEP	someone else's problem
SERC	Science & Engineering Research Council
SERC	Swedish Energy Research Commission
SER	Satellite Equipment Room
SE	South East
SESRA	Seattle Employee Services Recreation Association
SES	Service Evaluation System
SEST	Swedish-European Submillimeter Telescope
SE	Systems Engineer
SETI	Search for ExtraTerrestrial Intelligence
SET	Single Electron Transfer
SET	Software Engineering Technology
SFA	sweet fuck all
SFDM	Statistical Frequency Division Multiplexing
SFD	Sun Federal Division
SFMC	Satellite Facility Management Center
SFO	San Francisco CA
SFRPG	Science Fiction Role Playing Game
SF	San Francisco
SF	Science Fiction; Speculative Fiction
SF	Single Frequency
SF	Standard Form
SF	Star Frontiers
SGI	Silicon Graphics Incorporated
SGML	Standard Generalized Markup Language
SGMP	Simple Gateway Monitoring Protocol (superseded by SNMP)
SG	Signal Ground
SG	StarGuard
SG	SubGroup
SG	SuperGroup
SHAPE	Supreme Headquarters Allied Powers Europe
SHAR	SHell ARchiver
SHCD	Sherlock Holmes Consulting Detective
SHF	Super High Frequency (3-30GHz)
SHID	slaps head in disgust
SHRPG	Super Hero Role Playing Game
SIAM	Society for Industrial and Applied Mathematics
SICK	Single Income, Coupla' Kids
SIC	Second In Command
SIC	Silicon Integrated Circuit
SID	Sudden Ionospheric Disturbance
SID	System IDentification
SIGCAT	Special Interest Group for Cd-rom Applications Technology
SIG	Special Interest Group
SIMD	Single Instruction, Multiple Data
SIMM	Single Inline Memory Module
SINE	SINE is not EINE
SIPC	Securities Investment Protection Corporation
SIPP	Strategic Industry Partners Program
SIP	Single Inline Package/Pin
SIPS	Satellite Imagery Processing System
SIR	Shuttle Imaging Radar
SIRTF	Space (formerly Shuttle) InfraRed Telescope Facility
SISAL	Streams and Iteration in a Single-Assignment Language
SISCOM	Satellite Information System COMpany
SIS	Software Information Services
SIS	Strategic Information System
SI	Staten Island
SI	Status Indicator
SI	System Integrater
SITA	Societe Internationale Telecommunications Aeronautiques
SIT	Special Information Tone
SJC	San Jose CA
SJ	Society of Jesus
SKU	Stock Keeping Unit
SLALOM	Scalable Language-independent Ames Laboratory One-minute Measurement
SLAN	Sine Loco, Anno, (vel) Nomine (without place, year, or name)
SLAPP	Strategic Litigation Against Protesting People
SLAR	Side Looking Airborne Radar
SLA	Special Libraries Association
SLA	Symbionese Liberation Army
SLA	Synchronous Line Adapter
SLBM	Submarine Launched Ballistic Missiles
SLC	Space Launch Complex [Space]
SLC	Subscriber Loop Carrier
SLC	Super Low Cost
SLDC	Synchronous Data Link Control
SLED	Single Large Expensive Drive
SLE	Screening Line Editor
SLIC	Subscriber Line Interface Circuit
SLIC	System Link and Interrupt Controller (Sequent)
SLIM	Subscriber Line Interface Module
SLIP	Serial Line Internet Protocol
SLP	Super Long Play (VHS VCR, aka EP)
SL	Salvage Loss
SL	SpaceLab
SL	Space Launch [Space]
SLS	Space(lab) Life Sciences
SLUFAE	Surface Launched Unit, Fuel Air Explosive
SMA	Sergeant Major of the Army
SMASF	SMAS Frame
SMA	Spectrum Manufacturers Association
SMASPU	SMAS Power Unit
SMAS	Supplementary MAin Store
SMAS	Switched Maintenance Access System
SMB	System Message Block
SMC	Small Magellanic Cloud (see LMC)
SMDF	Subscriber Main Distributing Frame
SMDI	Subscriber Message Desk Interface
SMDR	Station Message Detailed Recording
SMDR	Station Message Detail Recording
SMDS	Switched Multimegabit Data Service
SMDS	switched multimegabit data service, Bellcore-developed standard
SMD	Standard Molecular Data format
SMD	Storage Module Device (interface standard for disk drives)
SMD	Surface Mounted Devices
SMEGMA	Sophisticated Modern Editor with Gloriously Magnificent Abilities
SMERSH	abbr. of Russian phrase meaning "Death to the spies."
SME	Society of Manufacturing Engineers
SME	Solar Mesosphere Explorer
SMEX	SMall EXplorers
SMG	SuperMasterGroup
SMILS	Sonobuoy Missile Impact Location System
SMI	Structure of Management Information
SMI	Sun Microsystems Inc.
SMIT	System Management Interface Tool
SMK	Software Migration Kit
SMLSFB	So Many Losers, So Few Bullets
SMM	Solar Maximum Mission
SMOC	Small Matter Of Commitment
SMOF	Secret Master Of Fandom
SMOH	Since Major OverHaul
SMOP	Simple/Small Matter Of Programming
SMO	Santa Monica CA
SMP	Symmetric MultiProcessing
SMPTE	Society of Motion Picture and Television Engineers
SMR	Service Marketing Representative
SMSA	Standard Metropolitan Statistical Area
SM	Service Mark
SM	Sado-Masochism
SM	Sex Magick
SMS	Service Management System
SM	Switching Module
SMTP	Simple Mail Transfer Protocol
SMT	Surface Mount Technology
SNADS	SNA Distribution Services
SNADS	Systems Network Architecture Distribution Service
SNAFU	Situation Normal -- All Fouled/F***ed Up
SNAP	Shipboard Non-tactical Automated data Processing program
SNAP	SubNetwork Access Protocol
SNAP	System and Network Administration Program
SNA	Santa Ana (Orange County) CA
SNA	Systems Network Architecture [IBM]
SNCF	Societe Nationale des Chemins de Fer (French National Railways)
SNERT	snot-nosed egotistical rude teenager
SNET	Southern New England Telephone
SNF	Server-Natural Format
SNF	Server Normal/Natural Format
SNI	Siemens Nixdorf Informationssysteme
SNMP	Simple Network Management Protocol
SNM	SunNet Manager
SNOBOL	StriNg Oriented symbOLic Language
SNPA	SubNetwork Point of Attachment
SNR	Signal to Noise Ratio
SNR	SuperNova Remnant
SN	Subnetwork Number
SN	Super Nova
SNTSC	Super NTSC (video)
SNU	Solar Neutrino Units
SOAC	Service Order Analysis Control
SOAP	Symbolic Optimizing Assembler Program
SOAR	Smalltalk On A Risc
SOC	Service Oversight Center
SOFIA	Stratospheric Observatory For Infrared Astronomy
SOF	Sales Order Form
SOHF	Sense Of Humor Failure
SOHO	SOlar Heliospheric Observatory
SOH	Service Order History
SOH	Start Of Header, ASCII control character (dec=01,control-A)
SOL	Shit Out [Of] Luck
SOL	Short on Landing (or, colloquially, Shit Out of Luck)
SOMM	Stop On Micro-Match
SONAR	Service Order Negotiation And Retrieval
SONAR	SOund Detection And Ranging
SONDS	Small Office Network Data System
SONET	Synchronous Optical NETwork
SOP	Standard Operating Procedure
SOR	Sales Order Request
SO	Sales Order
SO	Seller's Option
SO	Significant Other
SO	Space Opera
SOS	Save Our Souls (International standard distress call, Morse ...---...)
SOS	Silicon On Sapphire
SO	Strike Out
SOW	Speaking Of Which
SOW	Statement Of Work
SPAG	Standards Promotion and Applications Group
SPAN	Space Physics Analysis Network
SPAN	System Performance ANalyzer
SPARC	Scalable Processor ARChitecture
SPARC	Standards, Planning, And Requirements Committee
SPARS	Society of Professional Audio Recording Studios
SPAR	Stock Points Adp Replacement
SPA	Software Publishers Association
SPAWAR	naval SPAce and WARfare command
SPCA	Society for the Prevention of Cruelty to Animals
SPCC	Society for the Prevention of Cruelty to Children
SPC	Software Productivity Consortium
SPC	Southern Pacific Communications
SPCS	Stored Program Control Systems
SPC	Statistical Process Control
SPC	Stored Program Control
SPDL	Standard Page Description Language (ISO)
SPDM	Special Purpose Dextrous Manipulator
SPD	Software Products Division
SPEC	Standard Performance Evaluation Corporation
SPE	Symbolic Programming Environment
SPIM	Sun Product Information Meeting
SPI	Selective Population Inversion
SPI	Serial Peripheral Interface
SPITBOL	SPeedy ImplemenTation of snoBOL
SPL	System Programming Language
SPNI	Society for the Protection of Nature in Israel
SPOT	Systeme Probatoire pour l'Observation de la Terre
SPR	Software Problem Report
SP	Shore Patrol
SP	Short Play (VHS VCR)
SP	Signaling Point
SP	Signal Processor
SP	Southern Pacific (railroad) [Corporate name]
SPS	Self Praise Stinks
SPS	Solar Power Satellite [Space]
SPSS	Statistical Package for Social Sciences (computer software)
SPS	Standby Power System
SP	Stack Pointer
SP	Standard Play (VHS VCR)
SP	Star Patrol
SP	System Product (IBM VM)
SPUCDL	Serial Peripheral Unit Controller/Data Link, "SPUC/DL"
SPUD	Storage Pedestal Upgrade Disk/Drive
SPUR	Systech Pluraxial Unplug Repeater
SPU	System Processing Unit
SQA	Software Quality Assurance
SQC	Single-Quantum Coherence
SQC	Statistical Quality Control
SQE	Signal Quality Error ("heartbeat")
SQLDS	Structured Query Language/Data System, "SQL/DS"
SQL	Structured Query Language
SQO	Some Quantity Of
SQUID	Superconducting QUantum Interference Device
SRAM	Scratchpad RAM
SRAM	Short Range Attack Missile
SRAM	Static RAM
SRA	Selective Routing Arrangement
SRB	Solid (fuel) Rocket Booster [Space]
SRD	Secondary Receive Data
SRI	Stanford Research Institute (now called SRI International)
SRM	Solid Rocket Motor
SRO	Standing Room Only
SRP	Source Routing Protocol, an IBM specification
SR	Sales Representative
SRS	Service Repair System
SR	Street Regal (KDX)
SRTS	Secondary Ready To Send
SSAP	Session Service Access Memory
SSA	Soaring Society of America
SSA	Social Security Administration [U.S. Government]
SSAS	Station Signaling and Announcement Subsystem
SSBAM	Single-SideBand Amplitude Modulation
SSBBW	Super-Sized Big Beautiful Woman
SSB	Single SideBand
SSCP	Subsystem Services Control Point
SSCP	System Services Control Point
SSC	Safe, Sane, Consensual
SSC	Specialized Systems Consultants
SSC	Special Services Center
SSD	Solid State Disk
SSDU	Session Service Data Unit
S	second (SI abbrev.), "s"
SSEL	Session Service Selector
SSE	Software Support Engineer
SSE	South-SouthEast
SSFF	Showcase Software Factory of the Future
SSF	Space Station Fred (er, Freedom)
SSG	Staff SerGeant
S	Siemens
SSI	Small Scale Integration
SSI	Solid-State Imager (on Galileo)
SSI	Space Services Incorporated [Space]
SSI	Space Studies Institute
SSI	Supplemental Security Income
S	Sleeve
SSME	Space Shuttle Main Engine
SSO	Satellite Switching Office
S	South
SSPC	SSP Controller
SSPF	Space Station Processing Facility
SSPRU	SSP Relay Unit
SSP	Signal Switching Point
SSP	Sponsor Selective Pricing
SSPS	Satellite Solar Power Station [Space]
SSP	System Status Panel
SSRMS	Space Station Remote Manipulator System
SSR	Secondary Surveillance Radar
SSR	Soviet Socialist Republic
SS	Sales Support
SS	Sparc Station
SS	Special Services
SSS	Soc.Sexuality.Spanking
SSS	System Support Specialist
SS	Stack Segment
SS	Stop Ship
SSTO	Single Stage to Orbit [Space]
SST	Spectroscopic Survey Telescope
SST	Spread-Spectrum Technology
SST	SuperSonic Transport
SSTTSS	Space-Space-Time-Time-Space-Space network
SSTV	Slow Scan TeleVision
S	sulphur
S	Supplement
SSW	South-SouthWest
STAGE	Structured Text And Graphics Editor
STARS	Software Technology for Adaptable, Reliable Systems
STB	Software Technical Bulletin
STC	Serving Test Center
STC	Supplemental Type Certificate
STC	Switching Technical Center
STDM	Statistical Time Division Multiplexing
STD	Sacrae Theologiae Doctor (doctor of sacred theology)
STD	Secondary Transmit Data
STD	Sexually Transmitted Disease (replaces VD)
STD	State Transition Diagram
STD/STI	Sexually Transmitted Disease / .. Infection
STD	Subscriber Trunk Dialing [British, and elsewhere; equiv. DDD in USA]
STFU	Shut the Freak/Fuck Up
STFU	Sir, That's Freakin Ugly
STFW	Search The Freaking Web
STILO	Scientific and Technical Intelligence Liaison Office
STIS	Space Telescope Imaging Spectrometer (to replace FOC and GHRS)
STI	Standard Tape Interface
STL	St. Louis (Lambert) MO
STN	Scientific and Technical information Network
STN	SuperTwisted Nematic
STOH	Since Top Overhaul (cylinders, etc., but not crankshaft, etc.)
STOL	Short TakeOff and Landing
STO	Slater Type Orbital
STP	Shielded Twisted Pair
STP	Signal Transfer Point
STP	Software Through Pictures
STP	Spanning Tree Protocol, an IEEE 802.1 routing specification
STP	Standard Temperature and Pressure (see NTP)
STRPG	Star Trek:  The Role-Playing Game
STR	Spot The Reference
STSCI	Space Telescope Science Institute, "STScI"
ST	Seagate Technologies
ST	Short Ton
STSI	Space Telescope Science Institute
STS	Sales Technical Support
STS	Shared Tenant Service
STS	Shuttle Transport System (or) Space Transportation System
STS	Space-Time-Space network
ST	STart
STTNG	Star Trek, The Next Generation
STTNG	Star Trek: The Next Generation, "ST:TNG"
STTOS	Star Trek: The Old Stuff/The Original Series, "ST:TOS"
STV	Single Transferable Vote
STV	Space Transfer Vehicle [Space]
SUCCESS	SUn Corporate Catalyst Electronic Support Service
SUG	Sun User's Group
SUID	Set UID
SUM	Symantec Utilities for Macintosh
SUNDIAG	SUN system DIAGnostics software
SUNET	Swedish University NETwork
SUNOCO	SUN Oil COmpany [Corporate name]
SUN	Stanford University Network
SUNVIEW	SUN's Visual / Integrated Environment for Workstations
SUNY	State University of New York
SURANET	Southeastern Universities Research Association network, "SURAnet"
SURF	Sequent Users Resource Forum
SU	Set Uid
SUSP	System Use Sharing Protocol
SVC	Switched Virtual Circuits
SVGA	Super VGA
SVID	System V Interface Definition
SVP	Schematic Verification Program
SVR4	System V Release 4
SVS	Switched Voice Service
SVVS	System V Validation Suite
SVVS	System V Verification Suite
SWAG	Silly, Wild-Assed Guess
SWAHBI	Silly, Wild-Assed Hare-Brained Idea
SWAN	Sun Wide Area Network
SWAS	Submillimeter Wave Astronomy Satellite
SWB	SouthWestern Bell
SWF	ShortWave Fading
SWIFT	Society for Worldwide Interbank Financial Transfers
SWM	Solbourne Window Manager
SWO	Sales Work Order
SW	South West
SWS	Scientific Workstation Support (at ORNL)
SW	SuperWorld
SX	SimpleX signaling
SXS	Step by (X) Step switching [Telephony]
SYC	SYstem Control
SYMPL	SYsteMs Programming Language
SYN	SYNchronizing segment
SYSGEN	SYStem GENeration
T1	T-carrier 1 (digital transmission line, 1.544 Mbps, 24 voice channels), one of the basic signalling systems 24x64Kb [telephony]
T1FE	T1 carrier Front End
T1OS	T1 carrier OutState, "T1/OS"
T3	T-carrier 3 (eq 28 T1 channels, 44.736 Mbps, 672 voice channels) [Telephony]
TAB	Tape Assembly Bonding
TAB	Technical Assistance Board
TACCS	Tactical Army Combat service support Computer System
TAC	Tactical Air Command (see SAC)
TAC	Terminal Access Circuit
TAC	Terminal Access Controller [ARPAnet/MILNET/DDN]
TAE	Transportable Applications Environment
TAFN	That's All For Now
TAF	That's All Folks
TAG	Technical Advisory Group (ISO)
TAL	Transatlantic Abort Landing (Shuttle abort plan)
TAM	Total Available Market
TANJ	There Ain't No Justice
TANSTAAFL	There Ain't No Such Thing As A Free Lunch
TAP	Telephone Assistance Plan
TAR	Tape ARchiver
TASC	Technical Assistance Service Center
TASC	Telecommunications Alarm Surveillance and Control system
TASI	Time Assignment Speech Interpolation system
TAS	Telephone Answering Service
TA	Teaching Assistant
TA	Terminal Adaptor
TA	Territorial Army
TA	Transfer Allowed
TAT	TransAtlantic Telephone
TAT	Turn Arround Time
TAU	Thousand Astronomical Units [Space]
TBA	To Be Announced/Arranged
TBD	To Be Designed/Determined
TBH	To Be Honest
TBO	Time Between Overhaul
TB	TuBerculosis
TCAP	Transaction Capabilities Applications Port
TCAS	T-Carrier Administration System
TCA	Terminal Control Area
TCA	Terminal Controlled Airspace
TCB	Task Control Block
TCB	Trusted Computer Base
TCCC	Technical Committee on Computer Communications
TCC	Trunk Class Code
TCG	Test Call Generation
TCM	Time Compression Multiplexer
TCM	Trellis Coded Modulation
TCPIP	Transmission Control Protocol/Internet Protocol, "TCP/IP"
TCP	Transmission Control Protocol
TCR	Transient Call Record
TCSEC	Trusted Computer System Evaluation Criteria (orange book)
TCS	Thermal Control System
TCS	Traction Control System (to prevent wheel-spin)
TC	Teachers College
TC	Technical Committee (ISO)
TC	Timing Counter
TC	Tinned Copper
TC	Toll Center
TC	Total Color
TCT	To Challenge Tomorrow
TCT	Toll Connecting Trunk
TDAS	Traffic Data Administration System
TDCC	Transportation Data Coordinating Committee
TDC	Tape Data Controller
TDC	Terrestrial Data Circuit
TDD	Telecommunications Device for Deaf
TDD	Telephone Device for the Deaf
TDE	Transition Diagram Editor
TDI	Trusted Database Interpretation
TDL	Test Description Language
TDMA	Time-Division Multiple Access
TDM	Time-Division Multiplexing
TDO	Table of Denial Orders
TDRSS	Tracking and Data Relay Satellite System
TDRS	Tracking and Data Relay Satellite [Space]
TDR	Time Domain Reflectometer
TD	"Top's Disease"
TD	TouchDown
TD	Transmit Data
TD	Treasury Department
TDY	Temporary DutY
TEB	Teterboro NJ
TECO	Tape Editor and COrrector
TECO	Text Editor and COrrector
TEC	Technology Exchange Company
TEFLON	polyTEtraFLuOrethyleNe
TEHO	Tail End Hop Off
TELEX	TELetypewriter EXchange
TELSAM	TELephone Service Attitude Measurement
TEMA	Tubilar Exchanger Manufacturers Association
TEMPEST	Transient Electro-Magnetic Pulse Emanation STandard
TEMPOL	TEtraMethyl-PiperidinOL-oxyl
TEMPONE	TEtraMethyl-PiperidinONE-oxyl
TEMPO	Technical Military Programming Organization
TEMPO	TEtraMethyl-Piperidine-Oxyl
TEM	Transmission Electron Microscope
TENS	Transcutaneous Electrical Nerve Stimulator
TERM	TERMinal
TER	Technical Education Resources
TES	The Eulenspiegel Society
TES	Thermal Emission Spectrometer (on Mars Observer)
TE	Terminal Equipment
TE	Transverse Electric
TET	Test Environment Toolkit
TFC	Total Full Color
TFLAP	T-carrier Fault-Locating Applications Program
TFP	Tops Filing Protocol
TFS	Translucent File System
TFS	Trunk Forecasting System
TFTB	Topping From The Bottom
TFTP	Trivial File Transfer Protocol
TFT	The Fantasy Trip
TFT	Thin Film Transistor
TGC	Terminal Group Controller
TGIF	Thanks God It's Friday
TGN	Trunk Group Number
TG	Thieves' Guild
TG	TransGendered
TGV	Two Guys and a Vax
THF	TetraHydroFuran
THHGTTG	The Hitchhiker's Guide to the Galaxy
THIEF	THief/This Here Isn't Even Fine
THOR	Tandy High-intensity Optical Recording
THOR	THermal Optical Recording
THRUSH	Technological Hierarchy for the Removal of Undesireables and Subjugation of Humanity
TH	Trouble History
THX	Tom Holman Xover
TIA	Telephone Information Access
TIA	Thanks In Advance
TIA	Transient Ischemic Attack
TIC	TermInfo Compiler
TIC	Tongue in Cheek
TID	Ter In Die (three times a day)
TIFF	Tag(ged) Image File Format
TIGA	Texas Instruments Graphics Architecture
TIL	Today I Learned
TIMTOWTDI	There Is More Than One Way To Do It
TINA	This Is Not an Acronym
TINA	TINA Is Not an Acronym
TINC	There Is No Cabal
TIP	Team Improvement Program
TIRKS	Trunk Integrated Record Keeping System
TIROS	Television InfraRed Observation Satellite
TI	Texas Instruments [Corporate name]
TI	Transport Independent
TKO	Technical Knock Out
TK	TeleKommunikation
TLA	Three Letter Acronym
TLB	Translation lookaside buffer
TLC	Tender Loving Care
TLC	Thin-Layer Chromatography
TLDR	Too Long, Didn't Read
TLDNR	Too Long, Did Not Read
TLI	Transport Level Interface (AT&T stream-based protocol)
TLM	Trouble Locating Manual
TLN	Trunk Line Network
TLP	Transmission Level Point
TL	Total Loss
TLTP	Trunk Line and Test Panel
TLV	Type, Length, Value
TMAC	Treasury department's Multiuser Acquisition Contract
TMA	Tycho Magnetic Anomaly [movie 2001]
TMDF	Trunk Main Distributing Frame
TMIS	Telecommunications Management Information System
TMI	Too Much Information
TMJ	Temporal-Mandibular-Joint (affects opening mouth)
TMMS	Telephone Message Management System
TMO	Telephone Money Order
TMPTAWWTLO	The Missionary Position Twice a Week With the Lights Out
TMP	The Morrow Project
TMRC	Tech Model Railroad Club [MIT]
TMRC	Transportation Modeling Research Center (TMRC {above} alter ego)
TMRS	Traffic Measurement and Recording System
TMRS	Traffic Metering Remote System
TMR	Transient Memory Record
TMSC	Tape Mass Storage Control (DEC)
TMS	TetraMethylSilane; TriMethylSilyl
TMS	Time-Multiplexed Switch
TM	TradeMark
TM	Transverse Magnetic
TNC	Threaded Navy Connector
TNC	Threaded Neill Concelman (connector) [electronics] (see also BNC)
TNDS	Total Network Data System
TNN	Trunk Network Number
TNOP	Total Network Operation Plan
TNPC	Traffic Network Planning Center
TN	Telephone Number
TN	Tennessee
TN	Transaction Number
TNT	The NeWS Toolkit
TNT	TriNitroToluene
TN	Twisted Nematic
TOCSY	TOtal Correlation SpectroscopY
TOC	Table Of Contents
TODS	Transactions on Database Systems (ACM)
TOD	Time-Of-Day
TOMS	Total Ozone Mapping Spectrometer
TOMS	Transactions on Mathematical Software (ACM)
TOOIS	Transactions on Office Information Systems (ACM)
TOPICS	Total On-Line Program and Information Control System (NHK)
TOPLAS	Transactions on Programming Languages and Systems (ACM)
TOPS	Timesharing OPerating System
TOPS	Traffic Operator Position System
TOPS	Transcendental OPerating System
TOP	Technical/Office Protocol
TORES	Text ORiented Editing System
TOS	Terms Of Service / The Original Series
TOS	The Operating System
TOS	Transfer Orbit Stage [Space]
TOTBAL	There Ought To Be A Law
TO	Telegraph Office
TO	Turn Over
TOW	Tube launched, Optically tracked, Wire guided missile
TOY	Time Of Year (clock)
TP0	OSI Transport Protocol Class 0 (Simple Class)
TP4	OSI Transport Protocol Class 4 (Error Detection and Recovery Class)
TPC	The Phone Company [movie The President's Analyst)
TPE	Total Power Exchange
TPE	Twisted Pair Ethernet
TP	from TP0 and TP4 (ISO/CCITT Transport Services; like TCP)
TPI	Tracks Per Inch
TPMP	Total network data system Performance Measurement Plan
TPM	Third-Party Maintenance
TPO	Traveling Post Office
TPPI	Time-Proportional Phase Increment
TPS	Technical Publication Software
TPS	Technical Publishing Software
TPS	TeleProcessing Services
TPS	Thermal Protection System
TPS	Transactions Per Second
TPTB	The Powers That Be
TP	Test Plan
TP	Third Party
TP	Toll Point
TP	Transaction Processing
TP	Transport Protocol
TPT	Twisted Pair Transceiver
TP	Twisted Pair
TQC	Total Quality Control
TRAC	Total Risk Analysis Calculation (SunTrac)
TREAT	Trouble Report Evaluation Analysis Tool
TRIB	Transfer Rate of Information Bits
TRMTR	TRamsMiTteR
TROFF	Text RunOFF, text formatter
TROFF	Typsetter new ROFF
TRON	The Real-time Operating Nucleus
TRON	The Realtime Operating system Nucleus
TRR	Tip-Ring Reverse
TRR	Token Ring Repeater
TRSA	Terminal Radar Service Area
TR	Test Register
TR	Token Ring
TR	Transfer Register
TRUSIX	TRUSted unIX
TRW	Thompson, Ramo, and Woolridge
TSAP	Transport Service Access Point
TSCPF	Time Switch and Call Processor Frame
TSD	Total System Design
TSDU	Transport Service Data Unit
TSEL	Transport Service Selector
TSE	Technical Support Engineer (Sun)
TSI	Time Slot Interchanger
TSM	Tech Support Manager
TSORT	Transmission System Optimum Relief Tool
TSO	Technical Standard Order
TSO	Time Sharing Option
TSPS	Traffic Service Position System
TSP	Teleprocessing Services Program
TSP	Test SuPervisor
TSP	Thrift Savings Plan
TSP	Time Synchronization Protocol
TSP	Traffic Service Position
TSP	TriSodium Phosphate
TSR	Terminate and Stay Resident
TSR	Test Summary Report
TSR	TSR (Fortune 500 Company that manufactures Dungeons & Dragons)
TSS	Tethered Satellite System [Space]
TSS	Time-Sharing System
TSS	Trunk Servicing System
TSST	Time-Space-Space-Time network
TS	Top Secret
TSTO	Two Stage to Orbit [Space]
TS	TransSexual
TSTS	Time-Space-Time-Space network
TST	Time-Space-Time network
TST	Traveling-Wave Tube
TTBOMK	To The Best Of My Knowledge
TTC	Telecommunications Technology Council
TTC	Terminating Toll Center
TTD	Things To Do
T	tera- (SI prefix)
T	tesla
TTFN	Tah Tah, For Now
TTFN	Ta Ta For Now
T	Tip
TTL	Time To Live
TTL	Transistor-Transistor Logic
TTMA	Tennessee Tech Microcomputer Association
T	tonne(s), "t."
T	ton(s), "t."
TTP	Telephone Twisted Pair
TTP	Trunk Test Panel
T	Traveler
T	tritium
TTS	Trunk Time Switch
TTTN	Tandem Tie Trunk Network
TT	Trunk Type
TT	Tunnels & Trolls, "T&T"
T	tun(s), "t."
T2	T-carrier 2 (digital transmission line, 6.312 Mbps, 96 voice channels) [Telephony]
TTU	Tennessee Technological University
T2YL	Talk To You Later
T2UL	Talk To You Later
TTUL	Talk To You Later
TTYC	TTY Controller
TTYL	Talk To You Later
TTYTT	To Tell You The Truth
TTY	TeleTYpe(writer)
TUG	TeX User's Group
TUI	Text-Based User Interface
TUNIS	Toronto UNIversity System
TUR	Traffic Usage Recording
TUR	Trunk Utilization Report
TVA	Tennessee Valley Authority
TV	TeleVision
TVTWM	Tom's Virtual TWM
TWA	Trans World Airlines
TWAJS	That Was A Joke, Son
TWG	The Wollongong Group
TWIMC	To Whom It May Concern
TWM	Tab (or Tom's) Window Manager
TW	Thieves' World
TWT	Traveling Wave Tube
TWX	TeletypeWriter eXchange
TXID	Transuction Identifier
TX	Texas
TX	Transmit
TX	Transuction
TY	Thank You
TYT	Take Your Time
TYVM	Thank You Very Much
UAB	UNIX Appletalk Bridge
UAE	Unexpected Application Error
UAE	United Arab Emerates
UAF	User Authorization File
U&A(&LI)	Used and Abuse (and Loving It)
UAPDU	User Agent Protocol Data Unit
UARS	Upper Atmosphere Research Satellite
UART	Universal Asynchronous Receiver and Transmitter
UAR	United Arab Republic
UAR	User Action Routine
UA	United Artists
UA	User Agent
UBA	UniBus Adapter [DEC]
UBC	Universal Bibliographic Control
UBC	University of British Columbia
UBM	Unpressurized Berthing Mechanism
UCAR	University Corporation for Atmospheric Research
UCB	University of California at Berkeley
UCC	Uniform Commercial Code
UCD	Uniform Call Distribution
UCD	University of California at Davis
UCI	University of California at Irvine
UCLA	University of California at Los Angeles
UCL	Underwater Sound Laboratory
UCL	University College London
UCR	University of California at Riverside
UCSB	University of California at Santa Barbara
UCSC	University of California at Santa Cruz
UCSD	University of California at San Diego
UCSF	University of California at San Francisco
UC	University of CA
UC	Upper Case, "u.c."
UDB	Unified DataBase
UDF	User Defined Function
UDMH	Unsymmetrical DiMethyl Hydrazine
UDP	User Datagram Protocol
UDT	User Defined Type
UEC	User Environment Component
UFO	Unidentified Flying Object
UFS	Universal File System
UGC	Uppsala General Catalog
UG	Micro-Grip (HP plotter paper positioner)
UGT	Universal Greeting Time
UHF	Ultra High Frequency (300-3000MHz)
UHF	Unrestricted Hartree-Fock
UH	Upper Half
UIC	User Identification Code
UID	User IDentity
UIL	User Interface Language
UIMS	User Interface Management System
UIP	User Interface Program
UITP	Universal Information Transport Plan
UIT	Ultraviolet Imaging Telescope (Astro package)
UIUC	University of Illinois at Urbana-Champaign
UI	Unix International
UI	User Interface
UKST	United Kingdom Schmidt Telescope
UK	United Kingdom
ULANA	Unified Local-Area Network Architecture
UL	Underwriters Laboratory
UMA	Upper Memory Area
UMB	Upper Memory Blocks
UMT	Universal Military Training
UNCLE	United Network Command for Law Enforcement
UNESCO	United Nations Educational, Scientific, & Cultural Organization
UNICEF	United Nations International Children's Emergency Fund (now UN Child. Fund)
UNICS	UNiplex Information Computer Services
UNISTAR	UNIversal Single call Telecommunications Answering & Repair
UNIVAC	UNIversal Automatic Computer
UNIX	not an acronym at all.  Was a pun on MIT's MULTICS.
UNMA	Unified Network Management Architecture
UNO	United Nations Organization
UN	United Nations
UPC	Universal Product Code
UPDS	Uninterruptible Power Distribution System
UPI	United Press International [Corporate name]
UPN	Umgekehrte Polnische Notation (RPN)
UPS	Uninterruptible Power Supply
UPS	United Parcel Service [Corporate name]
UP	Union Pacific (railroad) [Corporate name]
UP	Upper Peninsula (of Michigan)
U	(representing the greek mu) - micro, "u"
UREP	UNIX-RSCS Emulation Program (BITNET software for UNIX)
UR	University of Rochester
USAC	United States Answer Center
USAC	United States Auto Club
USAC	US Answer Center (Sun Hotline)
USAFA	United States Air Force Academy (in Colorado Springs)
USAF	United States Air Force
USAN	University Satellite Network
USART	Universal Synchronous Asynchronous Receiver/Transmitter
USA	Union of South Africa
USA	United States Army
USA	United States of America
USB	Upper Side Band
USCA	United States Code, Annotated
USCG	United States Coast Guard
USC	University of Southern California
USDA	United States Department of Agriculture
USD	Underwriters Safety Device
USENET	USErs' NETwork
USES	United States Employment Service
USFL	United States Football League
USGS	United States Geological Survey
USG	Unix Support Group
USHGA	United States Hang Gliding Association
USIA	United States Information Agency
USITA	United States Independent Telephone Association
USL	Unix System Laboratories
USMC	United States Marine Corps
USMP	United States Microgravity Payload
USM	United States Mail
USN	United States Navy
USOC	Universal Service Order Code
USO	United Service Organizations
USO	Universal Service Order
USO	Unix Software Operation
USPS	United States Postal Service
USPTO	United States Patent and Trademark Office
USP	United States Pharmacopeia
USP	Universal Sampling Plan
USRT	Universal Synchronous Receiver/Transmitter
USR	User Service Routines
USSR	Union of Soviet Socialist Republics
USSS	User Services and Systems Support
USS	United States Ship
US	United States (of America)
USV	Unterbrechungsfreie StromVersorgung
USW	Und So Weiter
UTC	Universal Coordinated Time
UTE	Union Technique de i"Electricite"
UTP	Unshielded Twisted Pair
UTQGS	Uniform Tire Quality Grading System
UTR	UpTime Ratio
UTSL	use the source, Luke
UT	Universal Time
UT	University of Tennessee
UT	University of Texas
UT	UTah
UUCICO	Unix to Unix Copy Incoming Copy Outgoing
UUCP	Unix-to-Unix CoPy
UUG	Unix User Group
U	unified atomic mass unit, "u"
U	Universe
U	uranium
UUT	Unit Under Test
UVS	UltraViolet Spectrometer
UV	UltraViolet
UWCSA	University of Washington Computer Science Affiliates
UWS	Ultrix Workstation Software
UW	UnderWriter
UW	University of Wisconsin
VABIS	Vagn Aktie Bolaget i Soedertaelje (Swedish truck company)
VAB	Value Added Business
VAB	Vehicle Assembly Building (formerly Vertical Assembly Building)
VAC	Volts of Alternating Current
VADS	Verdix Ada Development System
VAD	Value Added Dealer
VAFB	Vandenberg Air Force Base
VANS	Value-Added Network Services
VAN	Value-Added Network (e.g. Tymnet, Telenet, etc)
VAP	Value-Added Process
VAR	Value-Added Remarketer/Reseller
VASCAR	Visual Average Speed Computer And Recorder
VASI	Visual Approach Slope Indicator
VAST	Virtual Archive Storage Technology
VAT	Value Added Tax
VA	Veterans Administration
VA	Virginia
VAV	Value Application Venders
VAXBI	VAX Bus Interconnect
VAX	Virtual Address eXtended
VBG	Very Big Grin
VB	Valence Bond
VB	Venture Business
VCCI	Volantary Control Council for Intersive
VCM	Voice Coil Motor
VCO	Voltage Controlled Oscillator
VCPI	Virtual Control Program Interface
VCR	VideoCassette Recorder
VCS	Virtual Circuit System
VCU	Virginia Commonwealth University
VC	Virtual Circuit
VDC	Volts of Direct Current
VDE	Verband Deutscher Electrotechniker
VDFM	Virtual Disk File Manager
VDI	Virtual Device Interface
VDM	Vienna Development Method
VDM	Virtual Device Metafile
VDS	Virtual DMA Services
VDT	Video Display Terminal
VD	Venereal Disease (see also STD)
VEEGA	Venus-Earth-Earth Gravity Assist (Galileo flight path)
VEG	very evil grin
VESA	Video Electronics Standards Association
VEU	Volume End User
VE	Value Engineering
VEX	Video Extension to X
VFEA	VMEbus Futurebus+ Extended Architecture
V	fiVe
VFO	Variable Frequency Oscillator
VFR	Visual Flight Rules
VFS	Virtual File System
VF	Video Frequency
VF	Voice Frequency
VFW	Veterans of Foreign Wars
VFW	Volunteer Fire Department
VFY	VeriFY
VGA	Video Graphics Array/Accelerator
VGF	Voice Grade Facility
VGI	Virtual Graphics Interface
VG	Very Good
VG	Vicar-General
VHDL	Vhsic Hardware Description Language
VHD	Video High Density
VHF	Very High Frequency (30-300MHz)
VHSIC	Very High Speed Integrated Circuit
VHS	Video Home System (VCR)
VIABLE	Vertical Installation Automation BaseLinE
VIC	V.35 Interface Cable
VIFRED	VIsual FoRms EDitor
VILE	VI-Like Emacs
VINES	VIrtual NEtwork Software
VINE	Vine Is Not Emacs
VIP	Very Important Person
VISTA	Volunteers In Service To America
VITA	Vme International Trade Association
VIU	Voiceband Interface Unit
VI	VIsual editor
VJ	Video Jockey
VLA	Very Large Array radio telescope in Arizona or New Mexico
VLBA	Very Long Baseline Array
VLBI	Very Long Baseline Interferometry
VLF	Very Low Frequency (3-30KHz)
VLIW	Very Long Instruction Word
VLSI	Very Large Scale Integration
VLT	Very Large Telescope
VL	Vulgar Latin
VMCF	Virtual Machine Communications Facility
VMCMS	Virtual Machine/Conversational Monitor System, "VM/CMS"
VMC	Visual Meteorological Conditions
VME	Versabus Module Europe
VME	Versa Modular Europa
VME	Virtual Machine Environment
VMM	Virtual Memory Manager
VMOS	Vertical Metal Oxide Semiconductor (V-MOS) (see MOS)
VMRS	Voice Message Relay System
VMR	Vertical Market Reseller
VMR	Volt-Meter Reverse
VMSP	Virtual Machine/System Product, "VM/SP"
VMS	Vertical Motion Simulator
VMS	Virtual Memory operating System
VMS	Virtual Memory System
VMS	Voice Mail System
VMS	Voice Management System
VMTP	Versatile Message Transaction Protocol
VM	Virtual Machine
VM	Virtual Memory
VNF	Virtual Network Feature
VNLF	Via Net Loss Factor
VNL	Via Net Loss plan
VNY	Van Nuys CA
VOA	Voice Of America
VOA	Volunteers Of American
VODAS	Voice Over Data Access Station
VOIR	Venus Orbiting Imaging Radar (superseded by VRM)
VOIS	Voice-Operated Information System
VOQ	Visiting Officer's Quarters
VORT	Very Ordinary Rendering Toolkit
VOR	VHF Omnidirectional Range
VPF	Vertical Processing Facility
VPISU	Virginia Polytechnic Institute and State University, "VPI&SU"
VPN	Virtual Private Network
VP	View Processor
VP	Virtual President
VRAM	Video-RAM
VRC	Vertical Redundancy Character
VRM	Venus Radar Mapper (now called Magellan)
VRM	Virtual Resource Manager
VRM	Voice Recognition Module
VROOMM	Virtual Realtime Object Oriented Memory Manager
VRS	Voice Response System
VR	Variety Reduction
VSAM	Virtual Sequential Access Method
VSAM	Virtual Storage Access Method
VSAT	Very Small Aperture Terminal, satellite dish
VSA	Virtual Server Architecture
VSB	Vestigial SideBand modulation
VSE	Virtual Storage Extended
VSP	Vector/Scalar Processor
VSR	Voice Storage and Retrieval
VSSP	Voice Switch Signaling Point
VSS	Voice Storage System
VS	VAXStation
VSX	X/open Verification Suite
VTAM	Virtual Telecommunications Access Method [IBM]
VTI	Virtual Terminal Interface
VTOC	Volume Table Of Contents
VTOL	Vertical TakeOff and Landing
VTP	Virtual Terminal Protocol
VTR	VideoTape Recorder
VTS	Video Teleconferencing System
VTS	Virtual Terminal Service
VT	Virtual Terminal
VUIT	Visual User Interface Tool
VUP	Vax Unit of Performance
VU	Volume Unit
V	vanadium
V	Vergeltungswaffe (reprisal weapon: V1, V2)
V	version, "v"
V	versus, "v."
V	volt(s)
VVSS	Vertical Volute Spring Suspension
VV	Villains & Vigilantes, "V&V"
VWS	VAX Workstation Software
VXI	VMEbus Extension for Instrumentation
WAC	Womens Air Corps
WADS	Wide Area Data Service
WAG	Wild-Assed Guess
WAIS	Wide Area Information Server
WAN	Wide Area Network
WAP	Wissenschaftliche ArbeitsPlatzrechner
WAP	Work Assignment Procedure
WARC	World Administrative Conference
WATFOR	WATerloo FORtran
WATSUP	WATfor Student Utility Program
WATS	Wide Area Telephone Service
WA	Washington
WA	Western Australia
WBC	White Blood Cells
WBS	Wednesday Business School
WBS	Work Breakdown Structure
WB	Water Ballast
WB	WayBill
WB	Welcome Back
WCL	Widget Creation Library
WCPC	Wire Center Planning Center
WCS	Writable Control Store (VAX)
WCTU	Women's Christian Temperance Union
WC	Water Closet
WC	Wire Center
WC	Without Charge
WDC	Washington, District of Columbia
WDC	Work Distribution Chart
WDM	wavelength-division multiplexing, for optical fibre, ultra-gigabit
WDT	Watch Dog Timer
WDYT	What Do You Think
WD	White Dwarf
WD	Working Draft
W/E	Whatever
WELL	Whole Earth 'Lectronic Link
WFM	Works For Me
WFPCII	Replacement for WFPC
WFPC	Wide Field / Planetary Camera (on HST)
WF	Work Factor method
WGS	WorkGroup System (AT&T's 386 PC)
WG	Working Group
WHBL	World Home Bible League
WHOI	Woods Hole Oceanographic Institution
WHO	World Health Organization
WHSE	Warehouse
WHSGNASBN	We Have Some Good News And Some Bad News
WH	WarHammer
Wiitwd(h)	What it is that we do (here)
WINS	Wollongong Integrated Networking Solutions
WIN	WIssenschaftsNetz
WIP	Work-In-Process
WIS	WWMCCS Information System
WITS	Washington Interagency Telecommunications System
WI	Wisconsin
WIYN	Wisconsin / Indiana / Yale / NOAO telescope
WKS	Well Known Services
WLN	Wiswesser Line Notation
WMF	Windows MetaFile
WMO	World Meteorological Organization
WMSCR	Weather Message Switching Center Replacement
WM	Work Manager
WNIM	Wide area Network Interface Module
WNN	Watashi no Namae ha Nakajima desu. (Kana-Kanji henkan), "Wnn"
WOA	Work Of Art
WOB	Waste Of Bandwidth
WOMBAT	Waste Of Money, Brains, And Time
WOPR	War Operations Planned Response (from "Wargames" movie)
WORM	Write Once, Read Many time
WOSA	Windows Open System Architecture
WO	Write Only
WOW	Worlds of Wonder
WPS	Word Processing Software
WP	Word Processing
WP	Working Paper
WRT	Whitewater Resource Toolkit
WRT	With Respect/Regard To
WSD	Work Station Division
WSI	Wafer Scale Integration
WSJ	Wall Street Journal
WSMR	White Sands Missile Range
WSN	Wirth Syntax Notation
WSP	Work Simplification Program
WS	Water Sports (see GS)
WS	Work Sampling
WS	Work Station
WSW	West-SouthWest
WTF	{What,where,who,why} The Fuck
WTH	{What,where,who,why} The Hell
WTR	Western Test Range
WUPPE	Wisconsin Ultraviolet PhotoPolarimter Experiment (Astro package)
WU	Washington University
WU	Western Union
WV	West Virginia
WW2	World War II
W	Wales/Welsh
W	watt
W	Wednesday, "W."
W	week(s), "w."
W	West
WWFO	World Wide Field Operations
W	Width
WWII	World War II
WWI	World War I
WWMCCS	World-Wide Military Command and Control System
W	wofram (tungsten)
WWOPS	World-Wide Operations
WW	World War
WYSIWIS	What You See Is What I See
WYSIWYG	What You See Is What You Get
WY	Wyoming
X25	CCITT recommendation for packet switched networks DTE interfacing, "X.25"
XA	eXtended Architecture (31-bit addressing in IBM machines)
XBT	X-Bar Tandem
XB	X-Bar
XCF	eXperimental Computing Facility
XCMOS	eXtended CMOS
XD	eX (without) Dividend
XDMCP	X Display Manager Control Protocol
XDR	eXternal Data Representation
XD	without Dividend
XFER	transFER (the X is for trans)
XFE	X-Front End
XGA	eXtended Graphics Adapter
XGMC	Xiphias Gladius Memorial Clique
XID	eXchange IDentification
XIE	X Imaging Extension
XIM	X Input Method
XINU	Xinu Is Not UNIX
XL	eXtra Large
XLFD	X Logical Font Description
XMI	eXtended Memory Interconnect (DEC)
XMM	X-ray Multi Mirror
XMPP	eXtensible Messaging and Presence Protocol
XMS	eXtended Memory Specification
XMS	eXtended Multiprocessor operating System
XMTR	transMiTteR (the X is for trans)
XNS	Xerox Network Services/Systems/Standard
XO	eXecutive Officer
XOR	eXclusive OR (logical function)
XPG2	X/Open Portability Guide Release-2
XPG3	X/Open Portability Guide Release-3
XPG	X/Open Portability Guide
XP	Jesus Christ (from the first two letters of "Christ" written in Greek)
XPORT	transPORT (the X is for trans)
XRM	X Resource Manager
XSECT	cross SECTion (the X is for cross)
XTAL	crysTAL (another version of x for crys, see XMTR)
XTAL	crysTAL (the X is for crys)
XTC	eXternal Transmit Clock
XT	eXtended Technology
XT	X.11 Toolkit, "Xt"
XUI	X-windows User Interface
XUV	eXtreme UltraViolet
XVIEW	X window system-based Visual/Integrated Environment for Workstations
XWSDS	X Window System Display Station
YACC	Yet Another Compiler Compiler
YAFIYGI	You Asked For It, You Got It
YA	Yet Another
YB	YearBook
YGM	You Got Mail
YGTR	You Got That Right
YHBT	You Have Been Trolled
YHL	You Have Lost
YKINMK	Your Kink Is Not My Kink
YKINOK	Your Kink Is Not Okay
YKIOK,IJNMK	Your Kink is OK, It's Just Not My Kink
YKWIM	You Know What I Mean
YMBJ	You Must Be Joking
YMCA	Young Mens Christian Association
YMHA	Young Mens Hebrew Association
YMMV	Your Mileage May Vary
YOB	Year Of Birth
YPVS	Yamaha Power Valve System
YP	Yellow Pages
YRS	Ysgarth Rules System
YSO	Young Stellar Object
YST	Yukon Standard Time
YTD	Year To Date
YT	Yukon Territory
YT	Yukon Time
YWCA	Young Womens Christian Association
YWHA	Young Womens Hebrew Association
YW	You're Welcome
Y	Year, "y."
Y	Yen
Y	yttrium
YY	Year
ZBB	Zero Base Budgeting
ZBR	Zone Bit Recording
ZB	Zero Beat
ZD	Zero Defect
ZETA	Zero Energy Thermonuclear Assembly
ZFS	Zero-Field Splitting
ZGS	Zero Gradient Synchrotron
ZG	Zero Gravity
ZIB	Konrad-Zuse-Zentrum fuer Informationstechnik Berlin
ZIF	Zero Insertion Force
ZIP	Zig-zag Inline Pin
ZIP	Zone Improvement Plan (post office code)
ZIP	Zone Information Protocol
ZI	Zonal Index
ZK	barrage balloon (navy symbol)
ZMRI	Zinc Metals Research Institute
ZPG	Zero Population Growth
ZPRSN	Zurich Provisional Relative Sunspot Number
ZQC	Zero-Quantum Coherence
ZST	Zone Standard Time
ZT	Zone Time
ZWEI	Zwei Was Eine Initially
Z	Zenith
Z	Zero
ZZF	Zentralamt zur Zulassung von Fernmeldeeinrichtungen