A2A - Application-to-Application
A2B - Administration-to-Business
A2C - Administration-to-Consumer
AA - Auto Answer
AAA - Authentication, Authorization and Accounting
AAAI - American Association for Artifical Intelligence
AAAS - American Assotiation for the Advancement of Science
AAAWD - Association of African American Web Developers
AABS - Automated Alternate Billing Service
AAC - Advanced Audio Coding
AAC - Authorization and Access Control
AACE - Association for the Advancement of Computing in Education
AACS - Ann Arbor Computer Society
AAD - Advanced Applications Database
AAD - Authorized AutoCAD Dealer
AADL - Axiomatic Architecture Description Language
AADN - American Association of Domain Names
AADR - Advanced Application Disaster Recovery
AAF - Adaptive Active Filter
AAF - Advanced Authoring Format
AAFID - Autonomous Agents For Intrusion Detection
AAIM - Association for Applied Interactive Multimedia
AAIS - Allied command europe ACCIS Implementation Strategy
AAL - ATM Adaption Layer
AAM - Automatic Acoustic Management
AAMSI - American Association for Medical Systems Informatics
AAP - Address Allocation Protocol
AAP - Applications Access Point
AAP - Association of American Publishers
AAPC - All-to-All Personalized Communication
AAPI - Administrative Application Programmer Interface
AAR - Automatic Alternative Routing
AARP - AppleTalk Address Resolution Protocol
AASP - ASCII Asynchronous Support Package
AAT - Avarage Access Time
AATP - Authorized Academic Training Program
AAU - Application Accelerator Unit
AAUI - Apple® Attachment Unit Interface
AAWIT - African-American Women In Technology
AB - Architecture Board
ABAP4 - Advanced Business Application Programming/4
ABATS - Automatic Bit Access Test System
ABB - Audio Building Block
ABBET - A Broad Based Environment for Test
ABBH - Average Bouncing Busy Hour
ABBS - Apple® Buletin Board System
ABC - Activity-Based Costing
ABC - Atanasoff-Berry-Computer
ABC - Automatic Broadcast Controller
ABCD - Altavista Business Card Directory
ABEL - Advanced Boolean Expression Language
ABEND - ABnormal END
ABET - Accreditation Board for Engineering and Technology
ABI - Application Binary Interface
ABIG - Access Bus Industry Group
ABIOS - Advanced Basic Input Output System
ABIST - Automatic Built In Self Test
ABLE - Adaptive Battery Life Extender
ABM - Activity-Based Management
ABM - Address Book Manager
ABM - Asynchronous Balanced Mode
ABO - Admin Base Object
ABP - Address Book Provider
ABR - Area Border Router
ABR - Available Bit Rate
ABS - Apple® Business Systems
ABUI - Association of Banyan Users International
AC - Access Control
AC - Alternating Current
AC - Area Code
AC - Audio Codec
AC - Authentication Center
AC - Automatic Computer
AC3 - Audio Compression - 3
AC97 - Audio CODEC 97
ACA - Asynchronous Communications Adapter
ACAD - AutoCAD
ACAP - AlphaServer Customer Assurance Program
ACAP - Application Configuration Access Protocol
ACAS - Application Control Architecture Services
ACB - Access Control Block
ACC - Area Communication Controller
ACC - Atari Competence Center
ACCE - Advanced Configurable Crypto Environment
ACCEL - Architecture for Cross-channel Customer Experience and Loyalty
ACCIS - Automated Command and Control Information System
ACCM - Asynchronous Character Control Map
ACCMS - Advanced Checkout, Control and Maintenance System
ACCS - Army Command and Control System
ACCU - Association of C and C++ Users
ACD - Active Configuration Directory
ACD - Automatic Call Distribution
ACDC - Alternating Current/Direct Current
ACDI - Asynchronous Communications Device Interface
ACDK - Artefaktur Component Development Kit
ACDS - Active Control Data Set
ACE - Access Control Entry
ACE - Advanced Computing Environment
ACE - All-purpose Collaboration Engine
ACE - ASIC Compiler Environment