STR
- Comparison of programming languages (string functions)
- Jaguar STR
- Physical strength
- R-Tree
- STR, Inc
- Scuderia Toro Rosso
- Short tandem repeat
- Short-term rental
- Silambarasan
- South Tynedale Railway
- Special Theory of Relativity
- Specialized Technology Resources
- Specialty registrar
- Steps to reproduce
- Stranraer Harbour railway station
- Stuttgart Airport
- Suspend to RAM
- Suspicious Transaction Report
- Swedish Twin Registry
- Synchronous transmit-receive
- Séminaire Saint-Joseph de Trois-Rivières