| Abbreviation | Definition |
|---|---|
| ORW | Olentangy River Wetland Research Park |
| OS | Outstanding Student |
| OS | Overseas Studies |
| OSA | Office of Student Activities |
| OSAP | Ontario Student Assistance Program |
| OSAP | Oxford Study Abroad Programme |
| OSB | Ontario Student Assistance Program |
| OSC | Office for Scholarly Communication |
| OSC | Ohio Supercomputer Center |
| OSCAR | Ofw Student Consulting And Research |
| OSCAR | Ohio State Catalog For Automated Retrieval |
| OSCAR | Ohio State Catalog Of Automated Resources |
| OSCAR | Online Student Computer Assisted Registration |
| OSCAR | Optical Scanning Computer Assisted Registration |
| OSCR | Office of Student Computing Resources |
| OSCR | Office of Student Conflict Resolution |
| OSE | Office of/for Student Employment |
| OSG | Open Science Grid |
| OSGA | Oklahoma Student Government Association |
| OSGP | Ozanam Study Grant Program |