| Acronym | Definition |
|---|
| POSC➣Political Science (course) |
| POSC➣Petrotechnical Open Software Corporation |
| POSC➣Pet Orphans of Southern California (Van Nuys, CA) |
| POSC➣Public Office Selection Committee (Australia) |
| POSC➣Payroll Online Service Center (state of Maryland) |
| POSC➣Personnel Occupational Specialty Code |
| POSC➣Program of Study Committee (various locations) |