| Abbreviation | Definition |
|---|---|
| STW | Stichting Technische Wetenschappen |
| SU | Salisbury University |
| SU | Sampson University |
| SU | Sellout University |
| SU | Sofia University |
| SU | Stanford University |
| SU | Student Union |
| SÜ | Selçuk Üniversitesi |
| ŠU | Šiauliu Universitetas |
| SUA | Slovak University of Agriculture |
| SUA | Soka University of America |
| SUA | Sokoine University of Agriculture |
| SUA | Sokoine University of Agriculture (Morogoro, Tanzania) |
| SUA | State Universities of America |
| SUA | Student Union Activities |
| SUA | Syracuse University Ambulance |
| SUAB | Student University Activities Board |
| SUAC | Senior University Administrators Course |
| SUAC | Shizuoka University of Art and Culture |
| SUAI | Saint Petersburg State University of Aerospace Instrumentation |