TBSI
| Acronym | Definition |
|---|---|
| TBSI | Traditional Building Skills Institute (Snow College; Ephraim, UT) |
| TBSI | Tafelmusik Baroque Summer Institute |
| TBSI | Texas Brain and Spine Institute (Bryan, TX) |
| TBSI | Turner Broadcasting System, Inc. International (Time Warner, Inc.) |
| TBSI | Tokyo Broadcasting System International |
| TBSI | Tert-Butyl-2-Benzothiazyl Sulfenimide |