RTSB
| Acronym | Definition |
|---|---|
| RTSB | Rentak Timur Sdn. Bhd. (Malaysian vanilla bean production company; est. 2004) |
| RTSB | Roundtable on Sustainable Biofuels |
| RTSB | Reel Tyme String Band (Indiana) |
| RTSB | Residential Treatment Services Bureau (Los Angeles, CA) |
| RTSB | Round Top State Bank (Texas) |