@LIS: Alliance for the Information Society
4DDA: 4-Dimensional Data Assimilation
AAAI: American Association for Artificial Intelligence
AAC: Advanced Audio Coding
AAHC: American Association for History and Computing
AAIM: Association for Applied Interactive Multimedia
AAMSI: American Association for Medical Systems and Informatics
AAT: Apple Advanced Typography
AAVI: American Academy of Veterinary Informatics
ABERT: Auto Bit Error Rate Test
ABI: Application Binary Interface
ACF: Advanced Computer Feasability
ACL: Association for Computational Linguistics
ACM: Association of Computing Machinery
ACP: Airline Control Program
ACPI: Advanced Configuration and Power Integration
ADAP: Automated Data Analysis Program
ADC: Analog-to-Digital Computer
ADC: analog-to-digital converter
AdCoM: Advances in Computational Mathematics
ADMS: Automated Data Management System
ADO: ActiveX Data Objects
ADPCM: Adaptive Differential Pulse Code Modulation
ADS: Alternate Data Stream
ADSI: Active Directory Services Interface
ADSP: AppleTalk Data Stream Protocol
ADT: abstract data type
AEC: Ars Electronica Center
AEOM: AppleEvent Object Model
AES: Advanced Encryption Standard
AFD: Acceptance For Data
AGU: Address Generation Unit
AI: Artificial Intelligence
AIC: Application Integration Components
AIDS: Airborne Integrated Data System
AIF: Auto Increment Field
AIKE: Artificial Intelligence and Knowledge Engineering
AIML: Artificial Intelligence Markup Language
AIMSUN: Advanced Interactive Microscopic Simulator for Urban and Non-Urban Networks
ALICE: Artificial Linguistic Internet Computer Entity