| Abbreviation | Definition |
|---|---|
| APSEA | Asian Pacific State Employee Association |
| APSEA | Asian Pacific State Employees Association |
| APSG | Association of Petroleum Surveying Geomatics |
| APSH | Association of Professional Stage Hypnotists |
| APSL | Association for the Promotion of the Study of Latin |
| APSL | Association of Philadelphia School Librarians |
| APSL | Association of Professional Sri Lankans |
| APSO | Association of Personnel Service Organisations |
| APSO | Association of Professional Scholastic Opticians |
| APSON | Association of Paediatric Surgeons of Nigeria |
| APSP | Association of Pediatric Surgeons of Pakistan |
| APSP | Association of Pool and Spa Professionals |
| APSP | Association of Pool Spa Professionals |
| APSS | Association of Publishers for Special Sales |
| APSW | Association of Psychiatric Social Workers |
| APT | Association for Play Therapy |
| APT | Association for the Prevention of Torture |
| APTA | American Public Transportation Association |
| APTA | Association for the Preservation of Tennessee Antiquities |
| APTC | Association of Professional Tour Caddies |