| AAAA | Alabama Accumulated Adjustment Account (Alabama Income Tax Form 20S) | |
| AAAA | Ajax Antique Arms Association (Ajax, ON, Canada) | |
| AAAA | Ajoittain Aivokuollut Ajanvietto Armeija | |
| AAAA | All Ateneo Alumni Alliance | |
| AAAA | Association Amie de l'Automobile Ancienne | |
| AAAA | Atelier Accessoires Automobiles Anciennes (French: Old Automobiles Accessories Workshop; auto parts manufacturer; Beychac-et-Caillau, France) | |
| AAAA | Army Aviation Association of America | |
| AAAA | Association for Applied Animal Andrology | |
| AAAA | Associated Actors and Artists of America | |
| AAAA | Alberta Aerial Applicators Association | |