| AA | kancelárska skr., čínska droga |
|---|---|
| AAB | Alliance Agricole Belge |
| AAC | Alliance Agricole Belge |
| AAI | Alliance of American Insurers |
| AAN | Air Ambulance Network |
| AAR | Alliance for Aging Research |
| AAS | Advances in the Astronautical Sciences |
| AAS | Alliance of AIDS Services (skr.) |
| AAS | Arabian Advanced Systems |
| AB | Asymmetric Balance |