| Abbreviation | Definition |
|---|---|
| OUQC | Oxford University Quidditch Club |
| OUR | Office of University Relations |
| OURC | Otago University Rowing Club |
| OUS | Ohio University Southern |
| OUS | Open University of Sudan |
| OUS | Oregon University System |
| OUS | Oxford Union Society |
| OUSA | Ontario Undergraduate Student Alliance |
| OUSA | Open University Student Association |
| OUSA | Open University Students Association |
| OUSA | Otago University Students' Association |
| OUSC | Ohio University Southern Campus |
| OUSL | Open University of Sri Lanka |
| OUSS | Oxford University Scientific Society |
| OUSSC | Oregon University Shared Services Center |
| OUSU | Oklahoma University Students Union |
| OUSU | Oxford University Student Union |
| OUV | Office of the University Veterinarian |
| OUW | Office for University Women |
| OUW | Office of University Writing |