| Term | Full Form | Category |
|---|---|---|
| OPSF | Occupational Physicians Scholarship Fund | Others |
| OPSF | Ogaden People Solidarity Forum | Others |
| OPSF | Olathe Public Schools Foundation | Others |
| OPSF | Old Pecan Street Festival | Others |
| OPSF | Orthogonal Polynomials and Special Functions | Others |
| OPSF | Owen-Putnam State Forest | Others |