| AAD | Assistant Athletic Director |
|---|---|
| AAD | Atomic Absorption Detector |
| AAE | Association of Art Editors |
| AAI | Autodesk Approved Instructor |
| AAS | American Auditory Society |
| ABL | Address Block Locator |
| ABL | Army Battle Laboratory |
| ABS | Adult Book Store |
| ACS | Air Campaign Simulator |
| ADA | planétka s priemerom 36 km, ktorú objavil R. S. Dugan 27. januára 1904 |