| Acronym | Definition |
|---|
| APSI | Amicassa Process Solutions, Inc. (Philippines) |
| APSI | Association of Plastic Surgeons of India |
| APSI | Agence de Promotion, de Soutien et de Suivi des Investissements (French) |
| APSI | Animal Protection Society of Iowa (Des Moines, IA) |
| APSI | Aircraft Propulsion Subsystem Integration |
| APSI | Associazione Prevenzione Studio Infezioni (Association for the Prevention andStudy of Infection) |
| APSI | Australian Professional Snowsports Instructors, Inc. |
| APSI | Autoimmune Polyglandular Syndrome Type I |
| APSI | Actuarial Program for Selected Items |
| APSI | Advanced Propulsion System Integration |
| APSI | Associazione Pediatri della Svizzera Italiana |
| APSI | Association for the Promotion of Scientific Innovation (Sudan) |