| AA | Anti-Aliasing |
|---|---|
| AAB | Antifašistická Akcia Bratislava (skr.) |
| AACO | Arizona Association of Counties (skr.) |
| AAM | Anti Aging Medicine |
| AAS | American Antiquarian Society |
| AAS | Asociación Argentina de Sedimentología |
| AAS | Association d'Animations Scientifiques |
| AAS | Australian Accounting Standard |
| AAT | Association of Accounting Technicians |
| ABAFI | slovenský politik, cestovateľ, revolucionár (František, 1732-1817) |