| Acronym | Definition |
|---|
| TST | Tsim Sha Tsui (Hong Kong) |
| TST | Tuberculin Skin Test |
| TST | Total Sleep Time |
| TST | Toronto School of Theology (Canada) |
| TST | Test Status |
| TST | Teacher Support Team |
| TST | Transition State Theory |
| TST | Technical Support Team |
| TST | Printer Test (File Name Extension) |
| TST | Time-Space-Time |
| TST | time-sensitive target (US DoD) |
| TST | Ternary Search Tree (data structure) |
| TST | Transatlantic Slave Trade (UNESCO) |
| TST | Tail Suspension Test |
| TST | Trauma Systems Therapy (behavioral health) |
| TST | Tactical Support Team (US DoD) |
| TST | Triceps Skinfold Thickness (body composition measurement) |
| TST | Team Selection Test (International Mathematical Olympiad) |
| TST | Thallium Stress Test (radioisotope heart imaging) |
| TST | Technical Services Team |
| TST | Transgressive System Tract |
| TST | Tandem Switched Transport |
| TST | True Stratigraphic Thickness |
| TST | Turkish Society of Toxicology (Turkey; est. 1987) |
| TST | Threaded Space Time |
| TST | The Starry Tides (band) |
| TST | top side tank (ships) |
| TST | Thermal Shock Testing |
| TST | Team Sumo Tournament (gaming) |
| TST | That Special Touch (Cambridge, ON, Canada) |
| TST | Theater Support Team (US DoD) |
| TST | Tactical SIGINT Technology |
| TST | The Scotson Technique (neurobiology) |
| TST | The Success Team |
| TST | Traitement du Signal et Télécommunications (French: Signal Processing and Telecommunications) |
| TST | Temperature Shock Test |
| TST | Top of Steel (architectural drawings) |
| TST | Time Saving Tip |
| TST | Test Set Tape |
| TST | Tactical Surveillance Technology |
| TST | Test Support Package |
| TST | The Shadow Team (Game Maker game programming team) |
| TST | Temporary Statutory Tour |
| TST | Task Status Table |
| TST | TASS Support Team (US Army) |
| TST | Transportation Systems Technician |
| TST | Transmission System Test |
| TST | Transdimensional Senso-Therapy |
| TST | Transmission System Technician (Navy Enlisted Classification) |
| TST | Total Solar Transmission (measurement of heat absorption) |
| TST | Target System Topical |
| TST | Triaxial Sheer Test (soil test) |
| TST | Totally Symmetric Tensor |
| TST | Topic Support Task |
| TST | Teen Stock Trader (web forum) |
| TST | The Spammers Takeout (website) |
| TST | Tribunal Superior do Trabalho (Portuguese: Superior Labor Court; Brazil) |
| TST | The Sharp Things (band) |
| TST | The Spanish Table |