| Abbreviation | Definition |
|---|---|
| ANSAN | Adelaide Nursing School Alumni Network |
| ANTS | Andover Newton Theological School |
| AOCS | Aviation Officer Candidate School |
| AOMS | Alice Ott Middle School |
| AOMS | Aviara Oaks Middle School |
| AOS | Air Observer School |
| AOS | Annunciation Orthodox School |
| APACS | Australian Psychologists and Counsellors in Schools |
| APB | Ardscoil Phobal Bheanntrai |
| APBS | Avicenne Private Business School |
| APC | Academic Progress Code |
| APCS | Academics Plus Charter Schools |
| APCS | Avoyelles Public Charter School |
| APCSC | Australian Psychologists and Counsellors in Schools Conference |
| APDS | Augusta Preparatory Day School |
| APE | After Prom Event |
| APFS | Art Projects for Schools |
| APHS | Abbot Pennings High School |
| APHS | Albert Powell High School |
| APHS | Alderman Peel High School |