| Abbreviation | Definition |
|---|---|
| SHU | Seton Hall University |
| SHU | Shanghai University |
| SHU | Sheffield Hallam University |
| SI | Student Instructor |
| SIA | Student Internet Association |
| SIA | Students' Internet Association |
| SIAA | Societas Iuridica Antiliana et Arubana |
| SIAS | School of Indigenous Australian Studies |
| SIAS | School of International and Area Studies |
| SIAS | Student Information Access System |
| SIAST | Saskatchewan Institute of Applied Science and Technology |
| SIB | Swiss Institute of Bioinformatics |
| SIBME | Singapore Informatics and Business Management Education Ltd. |
| SICAS | Study In China Admission System |
| SICP | Structure and Interpretation of Computer Programs |
| SID | Scientific Investigation Division |
| SID | Serious In Design |
| SID | Sports Information Director |
| SID | Support For Instructional Designers |
| SID | Sustainable International Development |