| AAB | Advertising Association of Baltimore |
|---|---|
| AAD | American Academy of Dermatology |
| AAF | American Advertising Federation |
| AAM | Advertising Account Manager |
| AAM | Anti Aging Medicine |
| AAPA | American Association of Port Authorities, Americké združenie prístavných úradov (angl.skr.) |
| AAR | Association of American Railroads, Asociácia amerických železničných spoločností (angl.skr.) |
| AAS | American Association of Suicidology |
| AAS | Asociación Argentina de Sedimentología |
| AAS | Association for Academic Surgery |