| AAB | Ateliers-Artistes-Belleville |
|---|---|
| AAS | Acid Addition System |
| AAS | Adaptive Antenna System |
| AAS | Against Assisted Suicide |
| AAS | Anabolic Androgenic Steroid |
| AAS | Applied Acoustics Systems |
| AAS | Arabian Advanced Systems |
| ABR | Australian Business Register |
| ABS | Action Battle System, typ fantasy bojového systému |
| ABS | Adaptive Business Systems |