| AANO | starší nórsky politik a misionár |
|---|---|
| ABC | Australian Broadcasting Commission |
| AC | Ascension (skr.) |
| AC | Augustana Confessio, augsburské vyznanie (lat.skr.) |
| AC | internetová doména pre Ascension |
| ACRP | Association of Clinical Research Professionals |
| ADAMS | bývalý juhoafrický profesionálny tenista (David, *1970) |
| ADD | Algebraic Decision Diagram |
| ADD | Army Digital Division |
| ADE | Assistant Division Engineer |