| AAB | Associação dos Arquivistas Brasileiros |
|---|---|
| AAB | Associació Aquariòfila de Barcelona |
| AAB | Atelier Artistique du Beton |
| AAE | automatic answering equipment (skr.) |
| AAS | American Antiquarian Society |
| AAS | Association d'Animations Scientifiques |
| ABE | Advanced Boresight Equipment |
| ABR | Average Bandwidth Requirement |
| ACE | Automatic Computer Equipment (skr.) |
| AER | Annual Equivalent Rate |