| AAP | Alternate Access Provider |
|---|---|
| AAS | Against Assisted Suicide |
| ABP | Address Book Provider |
| ACI | Automatic Card Identification |
| ADC | aide-de-camp (skr.) |
| ADP | Accidental Damage Protection |
| AIS | Universal Shipborne Automatics Identification System (skr.), univerzálny systém identifikácie lodí (angl.skr.) |
| AJE | American Journal of Epidemiology |
| AKP | Arbeidernes Kommunist Parti (skr.) |
| ATC | All Things Considered |