| AAC | Academic Advisory Center |
|---|---|
| ABADIR | posvätné kamene v Oriente |
| ABADIR | posvätný kameň v Oriente |
| ABADIR | v Oriente uctievané posvätné kamene |
| ABC | Alternative Birth Center |
| AC | assessment center (skr.) |
| ACC | Air Control Center |
| ACERO | španielsky staviteľ a architekt (Vicente, 1540 – 1602) |
| ADC | Advanced Development Centers |
| ADC | Air Defense Center |