| AARON | meno režiséra Spellinga |
|---|---|
| ABC | American Bowling Congress |
| ABEGHJAN | arménsky lingvista, literárny vedec a folklorista (Manuk, 1865-1944) |
| ABLAUT | striedanie samohlások (lingv.) |
| ABM | Agent-Based Modeling |
| ABS | Alternative Billing Service |
| ABS | Automated Billing System |
| AC | absolute ceiling (skr.), absolútna výška (angl.skr.) |
| ADÍCIA | prípona, sufix (ling.) |
| ADN | Abbreviated Dialing Number |