| AAB | American Association for Bronchology |
|---|---|
| AAS | Advances in the Astronautical Sciences |
| AAS | American Astronautical Society |
| AAS | American Astronomical Society |
| AAS | Astronomischer Arbeitskreis Salzkammergut |
| ABE | Automated Buyer Environment |
| ABM | Asynchronous Balanced Mode |
| ADE | Analog Design Environment |
| AEA | Airborne Electronic Attack |
| AEC | Army Environmental Center |