| AAAL | american academy of arts and letters |
|---|---|
| AAB | Agence Africaine de Biotechnologie |
| AAB | American Association for Bronchology |
| AAB | American Association of Bioanalytics |
| AAB | Anglo American Book |
| AAB | Application Architecture Blueprint |
| AAB | Asociación Andaluza de Bibliotecarios |
| AACO | Amaryllis Avakian Clinica Oftalmologica |
| AACO | Arab Air Carries Organization, Arabská organizácia leteckých dopravcov (angl.skr.) |
| AAD | American Academy of Dermatology |