| AAD | American Academy of Denturity |
|---|---|
| AAM | Aircraft Availability Model |
| AAS | Alabama Archaeological Society |
| AAS | American Antiquarian Society |
| AAS | American Arachnological Society |
| AAS | American Astronautical Society |
| AAS | American Astronomical Society |
| AAS | American Astrophysical Society |
| AAS | American Auditory Society |
| AAS | Assyrian Academic Society |