| AA | iniciály Agassi |
|---|---|
| AAD | Assistant Athletic Director |
| AAS | Against Assisted Suicide |
| ABC | Australian Broadcasting Commission |
| ABE | Assistant Brigade Engineer |
| ABM | anti-balistic missile (skr.), protibalistická raketa (angl.skr.) |
| AC | Animal Crossing |
| AC | Augustana Confessio, augsburské vyznanie (lat.skr.) |
| ACONCAGUA | argentínsky vrch, najvyšší vrch Ameriky i južnej pologule |
| ACONCAGUA | najvyšší vrch ÁND |