1. AAA ：1）. American Accounting Association 美國會計協會
2）. American Advertising Association 美國廣告協會
3）. American Arbitration Association 美國商務仲裁協會
2. AAL：American Airlines 美國航空公司
3. A.B.C.C.：Association of British Chambers of Commerce 英國商會聯合會
4. ABS：American Bureau of Shipping 美國船運局
5. AC：Air Canada 加拿大航空公司
6. ACC：American Chamber of Commerce 美國商會（又簡稱Amcham）
7. A.E.A：American Economic Association 美國經濟協會
8. AF：Air France 法國航空公司
9. AFEB：authorized foreign exchange bank 指定外匯銀行
10. AFRASEC：Afro-Asian Organization for Economic Cooperation 亞非經濟合作組織
11. AGM：annual general meeting（公司股東）年度大會
12. AID：Agency for International Development（美國）國際開發署
13. AMA：American Management Association 美國管理協會
14. ASA：American Standards Association 美國標準協會
15. Amex：American Stock Exchange 美國證券交易所
16. ADB：Asian Development Bank 亞洲開發銀行
17. APEC: Asia Pacific Economic Cooperation 亞太經濟合作組織（2001年10月將在中國上海召開部長級會議和非正式首腦會議）
3D :Three DimensionalAC :Alternating CurrentAIDS :Acquired Immune Deficiency Syndromeaka :also known asAM. :Ante MeridiemATM :Automatic Teller MachineAWT :Abstract Windows ToolkitCBC :Cipher Block ChainingCD :Compact DiscCEO :Chief Executive OfficerCIA :Central Intelligence AgencyCNN :Cable News NetworkCORE :Challenge Of Reverse EngineeringCPS1/2 :Capcom Play System 1/2CRT :Cathode-Ray TubeDC :Direct CurrentDJ :Disc JockeyECB :Electronic codebookERP :Enterprise Resource PlanningESPN :Entertainment Sports NetworkFBI :Federal Bureau Of InvestigationFM :Frequency ModulationIBM :International Business MachinesID :IDentificationIDE :Integrated Development Environmentioccc :the International Obfuscated C Code ContestIQ :Intelligence QuotientJ2EE :Java 2 Platform, Enterprise EditionJ2ME :Java 2 Platform, Micro EditionJ2SE :Java 2 Platform, Standard EditionKO :Knock OutLA :Los Angelesmutex :MUTual EXclusionNBA :National Basketball AssociationPC :Personal ComputerPE :Physical EducationPM. :Post MeridiemPO :Post OfficePS :PostScriptR&B :Rhythm and BluesRC :Release CandidateRISC :Reduced Instruction Set Computingrpm :revolutions per minuteSM :Sadism and MasochismS.M.A.R.T:Self-Monitoring Analysis and Reporting TechnologySMP :Symmetric MultiProcessingSMS :Short Message ServiceSOS :Save Our ShipTNT :TriNitroTolueneUFO :Unidentified Flying ObjectUK :United KingdomURL :Uniform Resource LocatorUS :United StateUSA :United State of AmericaVCR :Video Cassette RecorderVIP :Very Important PersonVLSI :Very Large Scale IntegrationW3C :World Wide Web ConsortiumXML :eXtensible Markup Language