| AAC | Academic Advisory Center |
|---|---|
| AAD | Atomic Absorption Detector |
| AAS | American Astronomical Society |
| AAS | Association for Academic Surgery |
| AAS | Assyrian Academic Society |
| AAS | Atomic Absorption Spectrophotometry |
| ACC | Academic Computer Club |
| ACS | Academic Computing Services |
| AEA | Atomic Energy Authority (skr.) |
| AEC | Atomic Energy Commision (skr.) |