| Abbreviation | Definition |
|---|---|
| STO | Still The One |
| STOP | Stop To Offer Prayer |
| STORM | Sending Teams Out Reaching Masses |
| STORM | Serving The Only Risen Messiah |
| STORM | Short Term Out Reach Ministries |
| STORM | Students Taking On Righteous Missions |
| STP | Study, Teach, Pray |
| STPC | Save The Persecuted Christians |
| STR | Sexually Transmitted Religion |
| STREAM | Science Technology Religion Engineering Art and Math |
| STREAM | Science Technology Religion Engineering Art and Mathematics |
| STREAM | Science Technology Religion Engineering Arts and Math |
| STREAM | Science Technology Religion Engineering Arts Mathematics |
| STREAM | Science Technology Religion Engineering the Arts and Mathematics |
| STS | Search The Scriptures |
| STS | Study The Scriptures |
| SUBIS | Sanchi University of Buddhist-Indic Studies |
| SUCCESS | Standing Up For Continuing Catholic Education Serving Students |
| SUDA | Spirit, Unity, Discipline, and Attitude |
| SUEU | Sydney University Evangelical Union |