| AAB | Associació Aquariòfila de Barcelona |
|---|---|
| AACO | Association Astronomique de Côte d'Or |
| AAP | Alternate Access Provider |
| AAS | Against Assisted Suicide |
| AAS | Annuaire des Associations de Santé |
| AAS | Association for Academic Surgery |
| AAS | Assyrian Academic Society |
| ABE | Assistant Brigade Engineer |
| ABP | Address Book Provider |
| ABS | Association of Black Students |