| Acronym | Definition |
|---|
| AAB | Association of Applied Biologists (UK) |
| AAB | American Association of Bioanalysts |
| AAB | Army Air Base |
| AAB | ABN Amro Bank |
| AAB | Alumni Advisory Board |
| AaB | Aalborg Boldspilklub (Danish Soccer Club) |
| AAB | All-to-All Broadcast |
| AAB | Airport Advisory Board |
| AAB | Advise and Assist Brigade (US DoD) |
| AAB | Ateliers d'Artistes de Belleville (French: Belgian Association of Antique Dealers; Belgium) |
| AAB | Aviano Air Base (Italy) |
| AAB | Administrative Appeals Board |
| AAB | Automatic Alternative Billing |
| AAB | Agence Africaine de Biotechnologie (French: African Agency of Biotechnology) |
| AAB | Aircraft Accident Board |
| AAB | Air Assault Brigade (UK) |
| AAB | Anti-Aircraft Battery |
| AAB | Aboriginal Affairs Branch (Canadian Ministry of Forests) |
| AAB | Air Assault Badge |
| AAB | Alliance Agricole Belge (Belgian Agricultural Alliance) |
| AAB | Adult Antisocial Behavior |
| AAB | Asian American Brotherhood |
| AAB | Auto Answer Back |
| AAB | Aviation Armament Bulletin |
| AAB | Association Autistes Besançon (French: Besancon Autism Association) |
| AAB | Asociación de Amigos del Bosque (Association of Friends of the Forest, Guatemala) |
| AAB | Army Aviation Board |
| AAB | Association Agir Contre le Bégaiement (French: Action Against Stuttering Association) |
| AAB | Adaptive Angle Bias |
| AAB | Arena e Arsimit Bashkëkohor (Albanian University, Kosova) |
| AAB | Adaptive Antenna Block |
| AAB | Auditory Attentional Blink |
| AAB | Acquisition Accession Board |
| AAB | Anti-Aircraft Balloon |
| AAB | Application Architecture Blueprint (Sprint) |
| AAB | Artichoke Advisory Board |
| AAB | Average Available Bandwidth |
| AAB | Assessment Appeals Board (various locations) |
| AAB | American Academy in Berlin (est. 1994; Berlin, Germany) |
| AAB | Alumni Association Board (various schools) |
| AAB | Albanian Association of Banks (est. 1999) |
| AAB | Acid-Alkaline Balance (health) |
| AAB | Advertising Association of Baltimore (now American Advertising Federation of Baltimore; Baltimore, MD) |