| Acronym | Definition |
|---|
| APSO➣Agency for Personal Service Overseas |
| APSO➣Association of Personnel Service Organisations (est. 1977; South Africa) |
| APSO➣Asylum Pre-Screening Officer (US DHS) |
| APSO➣Appalachian People's Service Organization |
| APSO➣Audio Precision System One (audio signal measurement device) |
| APSO➣Adaptive Particle Swarm Optimization |
| APSO➣Antwerpse Post Sport Olympia (Dutch: Antwerp Olympic Sport Post; sports blog; Belgium) |