| Acronym | Definition |
|---|
| TSF | Tech Support Forum (online forum) |
| TSF | Text Services Framework |
| TSF | Télécoms Sans Frontières (French: Telecoms Without Borders; humanitarian aid organization; est. 1998) |
| TSF | Télégraphie Sans Fil (French: former term for radio) |
| TSF | Twelve Step Facilitation (counseling intervention) |
| TSF | TOE Security Functions |
| TSF | Triceps Skinfold |
| TSF | Tillamook State Forest (Oregon) |
| TSF | Tons per Square Foot |
| TSF | The Silent Force (band) |
| TSF | Telephone Service Factor (percentage of calls answered in 20 seconds) |
| TSF | Telefonia Sem Fios (Portuguese radio service) |
| TSF | Transmission Sans Fil (French: Wireless Transmission) |
| TSF | TeliaSonera Finland (telecommunications company) |
| TSF | Tailing Storage Facility (mining) |
| TSF | Terre Sans Frontières |
| TSF | Terascale Simulation Facility (Lawrence Livermore National Laboratory, California ) |
| TSF | Tetraselenafulvalene |
| TSF | The Sports Factory (Milfort, CT indoor training facility) |
| TSF | Tire Stewardship Fee (Canada) |
| TSF | Tower Shielding Facility |
| TSF | Traducteurs Sans Frontières (French: Translators Without Borders) |
| TSF | Twisted Software Foundation |
| tSf | The Sonic Foundation (Sonic the Hedgehog fan website) |
| TSF | Jazz Jackrabbit 2: The Secret Files (game) |
| TSF | Tree Scatternet Formation |
| TSF | Team Strike Force (band) |
| TSF | Telos Security Force (Star Wars series) |
| TSF | That's So Funny |
| TSF | Temporary Storage Facility |
| TSF | Tab Separated File |
| TSF | The Stanford Fund (Stanford University; California) |
| TSF | Tourism Service Fee (Nepal) |
| TSF | Tallinn Salsa Festival (Estonia) |
| TSF | Trading Spaces Family (TV show) |
| TSF | Tactical Strike Fighter |
| TSF | Tritium Separation Facility |
| TSF | T-Shirt Forums (website) |
| TSF | Tactical Special Forces (gaming clan) |
| TSF | Thin Slot Formalism |
| TSF | Tritium Salt Facility |
| TSF | Talkspurt/Silence Flag |
| TSF | The Shared Forums (Mac Security forums) |
| TSF | Transparent Spanning Frame |
| TSF | Training Summary File |
| TSF | Tactical Support Facility |
| TSF | Technical Services Firm |
| TSF | Ten-Statement FORTRAN |
| TSF | Temporal-Spatial Filtering |
| TSF | Task Semantic Failure |
| TSF | Tooth Shear Fatigue (gear failure) |
| TSF | TSEC Spiritual Foundation (Thadomal Shahani Engineering College; Mumbai ,India) |
| TSF | Trips, Slips and Falls (workplace risk) |
| TSF | Training Services Flight (Royal Australian Air Force) |
| TSF | Thrift Savings Fund (retirement savings and investment plan) |
| TSF | Tri-State Family |
| TSF | Time Standard File |
| TSF | Trojmiejska Szkola Fotografii (Tri-City School of Photography, Sopot, Poland) |
| TSF | Trade Structure Finance |
| TSF | Tulsa State Fair (Tulsa, OK) |
| TSF | The Science Fair (various organizations) |
| TSF | Tandem Switching Feature (telecommunications) |
| TSF | Trout Stocked Fishery (classification; Pennsylvania) |
| TSF | Thrust Scale Factor (aircraft engine design) |
| TSF | Theatre Strike Force (sketch comedy group; University of Florida; Gainesville, FL) |
| TSF | Total Square Footage (measurement) |