| Abbreviation | Definition |
|---|---|
| ASWG | ASOS Software Working Group |
| ASX | Active Streaming Xml |
| ASX | Asian Sound Xpress |
| AT | Agile and Transparent |
| ATC | Advanced Tactical Center |
| ATC | Ahead of Time Compilation |
| ATC | Allbase Turbo Connect |
| ATC | Author The Computer |
| ATH | Add To Homescreen |
| ATIS | Airport Terminal Information Service |
| ATK | Attack Tool Kit |
| ATL | Activex Template Library |
| ATLAS | Aggregate Table Language And System |
| ATLAS | Automatically Tuned Linear Algebra Software |
| ATLAS | Automatically-Tuned Linear Algebra Software |
| ATM | Automated Telephone Manager |
| ATP | Assembly, Testing, and Packaging |
| ATRAC | Adaptive TRansform Acoustic Coding |
| ATRT | All The Right Type |
| ATS | Apple Type Services |