3D
3M
4GL
4H
4WD
A
A&A
A&M
A/D
A/P
A/R
AA
AAA
AAAL
AAAS
AAII
AAMSI
AAO
AAP
AAR
AARC
AARN
AARP
AAS
AAVSO
AB
ABA
ABBR
ABC
AC
ACAA
ACAWS
ACBL
ACC
ACCS
ACD
ACE
ACF
ACHEFT
ACK
ACL
ACLU
ACM
ACRV
ACS
ACSE
ACT
ACTS
ACU
ACW
AD
Ad Astra
AD&D
ADAP
ADB
ADC
ADCI
ADF
ADM
ADP
ADPCM
ADS
ADSR
ADT
AE
AEA
AEC
AEF
AEGIS
AF
AFADS
AFATDS
AFB
AFC
AFCAC
AFCC
AFGE
AFIPS
AFL
AFLCIO
AFNOR
AFP
AFS
AFSC
AFSCME
AFTRA
AFV
AG
AGCT
AGN
AHL
AHQ
AI
AIAA
AIC
AID
AIDDE
AIDS
AIOD
AIS
AIX
AJ
AK
AKA
AL
ALA
ALB
ALBM
ALC
ALGOL
ALIT
ALPO
ALS
ALU
AM
AMA
AMARC
AMBA
AMC
AMD
AMEX
AMI
AMORC
AMP
3D is an abbreviation for 3-Dimensional
3M is an abbreviation for Minnesota Mining and Manufacturing
4GL is an abbreviation for Fourth Generation Language
4H is an abbreviation for Head, Heart, Hands, Health
4WD is an abbreviation for Four wheel Drive (see also FWD)
A is an abbreviation for Aftermath
A&A is an abbreviation for Astronomy and Astrophysics
A&M is an abbreviation for Agricultural and Mechanical
A/D is an abbreviation for Analog to Digital converter (see ADC)
A/P is an abbreviation for Accounts Payable
A/R is an abbreviation for Accounts Receivable
AA is an abbreviation for Affirmative Action committee; Alcoholics Anonymous; Antiaircraft Artillery; Associate in Accounting; Automobile Association
AAA is an abbreviation for American Automobile Association
AAAL is an abbreviation for American Academy of Arts and Letters
AAAS is an abbreviation for American Association for the Advancement of Science
AAII is an abbreviation for American Association of Individual Investors
AAMSI is an abbreviation for American Association for Medical Systems Informatics
AAO is an abbreviation for Anglo-Australian Observatory
AAP is an abbreviation for Affirmative Action Program
AAR is an abbreviation for Automatic Alternate Routing
AARC is an abbreviation for Anglo-American Cataloging Rules
AARN is an abbreviation for Australian Academic Research Network
AARP is an abbreviation for American Association of Retired Persons
AAS is an abbreviation for American Astronomical Society
AAVSO is an abbreviation for American Association of Variable Star Observers
AB is an abbreviation for ABle seaman
ABA is an abbreviation for American Bar Association; American Basketball Association; American Booksellers Association
ABBR is an abbreviation for ABBReviation
ABC is an abbreviation for American Broadcasting Company
AC is an abbreviation for Alternating Current (see also DC); Ante Christum (before Christ); Ante Cibum (before meals)
ACAA is an abbreviation for Agricultural Conservation and Adjustment Administration
ACAWS is an abbreviation for Advisory, Caution, And Warning System
ACBL is an abbreviation for American Contract Bridge League
ACC is an abbreviation for Argonne Code Center
ACCS is an abbreviation for Army Command and Control System
ACD is an abbreviation for Automatic Call Distributor
ACE is an abbreviation for Advanced Composition Explorer; Advanced Computing Environments; Automatic Calibration and Equalization
ACF is an abbreviation for Advanced Communications Function
ACHEFT is an abbreviation for Automated Clearing House Electronic Funds Transfer
ACK is an abbreviation for ACKnowledge
ACL is an abbreviation for Advanced Cmos Logic
ACLU is an abbreviation for American Civil Liberties Union
ACM is an abbreviation for Association for Computing Machinery
ACRV is an abbreviation for Assured Crew Return Vehicle or Astronaut Crew Rescue Vehicle
ACS is an abbreviation for Advanced Communications System
ACSE is an abbreviation for Association Control Service Entity (ISO/CCITT layer 7)
ACT is an abbreviation for Action for Children's Television; American Conservatory Theater
ACTS is an abbreviation for Advanced Communications Technology Satellite; Automatic Coin Telephone Service
ACU is an abbreviation for Alarm Control Unit; Automatic Call Unit
ACW is an abbreviation for Alternating Continuous Waves
AD is an abbreviation for After Date; Anno Domini (in the year of our Lord); Application Development
Ad Astra is an abbreviation for To the stars
AD&D is an abbreviation for Advanced Dungeons & Dragons
ADAP is an abbreviation for Alzheimer's disease-associated protein; American Discount Auto Parts
ADB is an abbreviation for A DeBugger; Apple Desktop Bus
ADC is an abbreviation for Analog to Digital Converter
ADCI is an abbreviation for Automatic Display Call Indicator
ADF is an abbreviation for Automatic Direction Finder
ADM is an abbreviation for ADMiral
ADP is an abbreviation for Adenosine Di-Phosphate; Administrative Data Processing; Advanced Data Processing
ADPCM is an abbreviation for Pulse Code Modulation with Adaptive Quantization
ADS is an abbreviation for Application Development System
ADSR is an abbreviation for Attack Decay Sustain Release
ADT is an abbreviation for Abstract Data Type; Atlantic Daylight Time
AE is an abbreviation for Application Execution
AEA is an abbreviation for American Electronics Association
AEC is an abbreviation for Atomic Energy Commission
AEF is an abbreviation for American Expeditionary Force (see BEF)
AEGIS is an abbreviation for Advanced Electronic Guidance and Instrumentation System
AF is an abbreviation for Adventures in Fantasy; Air Force; Audio Frequency
AFADS is an abbreviation for Automatic Force Adjustment Data System
AFATDS is an abbreviation for Advanced Field Artillery Tactical Data System
AFB is an abbreviation for Air Force Base
AFC is an abbreviation for American Football Conference; Automatic Flight Control; Automatic Frequency Control
AFCAC is an abbreviation for Air Force Computer Acquisition Center
AFCC is an abbreviation for Air Force Communications Command
AFGE is an abbreviation for American Federation of Government Employees
AFIPS is an abbreviation for American Federation of Information Processing Societies
AFL is an abbreviation for American Federation of Labor; American Football League
AFLCIO is an abbreviation for American Federation of Labor and Congress of Industrial Organizations
AFNOR is an abbreviation for Association Francaise de NORmalization
AFP is an abbreviation for Appletalk Filing Protocol
AFS is an abbreviation for Andrew File System
AFSC is an abbreviation for Air Force Systems Command
AFSCME is an abbreviation for American Federation of State, County and Municipal Employees
AFTRA is an abbreviation for American Federation of Television and Radio Artists
AFV is an abbreviation for Armoured Fighting Vehicle
AG is an abbreviation for Adjutant General; Arcade Game; Attorney General
AGCT is an abbreviation for Army General Classification Test
AGN is an abbreviation for Active Galactic Nucleus
AHL is an abbreviation for American Hockey League
AHQ is an abbreviation for Air HeadQuarters
AI is an abbreviation for Artificial Intelligence
AIAA is an abbreviation for American Institute of Aeronautics and Astronautics
AIC is an abbreviation for Automatic Intercept Center
AID is an abbreviation for Agency for International Development
AIDDE is an abbreviation for Ames' Interactive Dynamic Display Editor
AIDS is an abbreviation for Acquired Immune Deficiency Syndrome
AIOD is an abbreviation for Automatic Identification Outward Dialing
AIS is an abbreviation for Automatic Intercept System
AIX is an abbreviation for Advanced Interactive eXecutive
AJ is an abbreviation for Astronomical Journal
AK is an abbreviation for Alaska
AKA is an abbreviation for Also Known As
AL is an abbreviation for Alabama; American League (baseball)
ALA is an abbreviation for American Library Association; Automobile Legal Association
ALB is an abbreviation for Analog LoopBack
ALBM is an abbreviation for Air-to-Land Ballistic Missile
ALC is an abbreviation for Automatic Load Control
ALGOL is an abbreviation for ALGOrithmic Language
ALIT is an abbreviation for Automatic Line Insulation Testing
ALPO is an abbreviation for Association of Lunar and Planetary Observers
ALS is an abbreviation for Advanced Launch System
ALU is an abbreviation for Arithmetic Logic Unit
AM is an abbreviation for Amplitude Modulation; Ante Meridiem (before noon)
AMA is an abbreviation for American Medical Association; Automatic Message Accounting
AMARC is an abbreviation for Automatic Message Accounting Recording Center
AMBA is an abbreviation for Association of Master of Business Administration
AMC is an abbreviation for Albany Medical College; American Motors Corporation; Appalachian Mountain Club
AMD is an abbreviation for Advanced Micro Devices
AMEX is an abbreviation for AMerican EXpress
AMI is an abbreviation for Alternate Mark Inversion (see also NRZ, NRZI, B8ZS)
AMORC is an abbreviation for Ancient Mystic Order Rosae Crucis
AMP is an abbreviation for Adenosine MonoPhosphate