| Abbreviation | Definition |
|---|---|
| APS | Association for Psychological Science |
| APSA | Adirondack Powder Skier Association |
| APSA | All Peoples' Sports Association |
| APSA | American Pediatric Surgical Association |
| APSA | American Physician Scientists Association |
| APSA | American Political Science Association |
| APSA | Arizona Private School Association |
| APSA | Arizona Process Servers Association |
| APSA | Asia and Pacific Seed Association |
| APSA | Asia Pacific Seed Association |
| APSA | Asia Pacific Seeds Association |
| APSA | Asian Pacific Student Association |
| APSA | Association of Professional Security Agencies |
| APSA | Automotive Parts and Services Association |
| APSAC | Association of Pupil Services And Attendance Counselors |
| APSC | Association of Professional Sleep Consultants |
| APSE | Association for Persons in Supported Employment |
| APSE | Association of People Supporting EmploymentFirst |
| APSE | Association of Pet Sitting Excellence |
| APSEA | All Pakistan Solvent Extractors Association |