| AAB | Advertising Association of Baltimore |
|---|---|
| AAB | Agence Africaine de Biotechnologie |
| AAB | Association of Aircraft Brokers, Združenie sprostredkovateľov v leteckej doprave (angl.skr.) |
| AAB | Association of Applied Biologists |
| AACO | AIDS Activities Coordinating Office |
| AAD | American Academy of Dermatology |
| AAF | American Advertising Federation |
| AAN | American Academy of Neurology (skr.) |
| AAN | American Academy of Nursing |
| AAPA | American Association of Port Authorities, Americké združenie prístavných úradov (angl.skr.) |