| OSPA | Obsessive Skin Pickers Anonymous 
| Others |
| OSPA | Office of School Performance and Accountability
| Others |
| OSPA | Office of Science Planning and Assessment
| Others |
| OSPA | Office of Sponsored Programs Administration
| Others |
| OSPA | Office of Sponsored Projects Administration
| Others |
| OSPA | Office of Strategic Planning and Analysis
| Others |
| OSPA | Ohio School Psychologists Association
| Others |
| OSPA | Ohio State Prospectors Association
| Others |
| OSPA | Oregon School
| Others |
| OSPA | Oregon School Personnel Association
| Others |
| OSPA | Oregon School Psychologists Association
| Others |
| OSPA | Oregon Society of Physician Assistants
| Others |
| OSPA | Oregon State Pharmacy Association
| Others |
| OSPA | Outer Surface Protein A
| Others |
| OSPA | Outstanding Student Paper Awards
| Others |