| AAS | Austrian Academy of Sciences |
|---|---|
| AAS | Austrian Atherosclerosis Society |
| ABS | akrylonitrilbutadiénstyrén (skr.) |
| ADA | Alternative Distribution Alliance |
| ADD | Air Defense District |
| ADD | Assistant District Director |
| ADL | Advanced Distributed Learning |
| ADP | Active Distribution Panel |
| ADP | Application Distribution Protocol |
| AEM | Application Explorer Mission, tri americké družice určené na diaľkový prieskum Zeme |