| Abbreviation | Definition |
|---|---|
| APSG | American Personal Security Guards |
| APSG | American Physical Security Group |
| APSG | American Physicians Service Group |
| APSG | Antisymmetrized Product Of Separated Geminals |
| APSG | Asia Pacific Space Geodynamics |
| APSG | Asia Pacific Studies Group |
| APSG | Asset Protection Strategies Group |
| APSG | Association of Petroleum Surveying Geomatics |
| APSG | Automotive Parts Services Group |
| APSG | Ayam Panggang Situ Gintung |
| APSH | Alutiiq Pride Shellfish Hatchery |
| APSH | Annual Probable Sunlight Hours |
| APSH | Asian Pacific Society of Hypertension |
| APSH | Association of Professional Stage Hypnotists |
| APSI | Advanced Placement |
| APSI | Advocacy and Protective Services Inc |
| APSI | Alienation of Personal Services Income |
| APSI | Alltek Project Solutions Integration |
| APSI | Amicassa Process Solutions Inc |
| APSI | Aqua Power Systems Inc |