| Acronym | Definition |
|---|
| TSG | Technical Specification Group |
| TSG | Transgender Support Group (various locations) |
| TSG | Test Signal Generator (US DoD) |
| TSG | The Smoking Gun (web site) |
| TSG | The SCO Group (US software/finance company) |
| TSG | Technology Services Group (UK) |
| TSG | The Swag Guy (web username) |
| TSG | Tumor Suppressor Gene |
| TSG | Tennessee State Guard |
| TSG | Toyo Sasaki Glass (est. 2002; Japan) |
| TSG | Terminal Services Gateway |
| TSG | Technology Solutions Group |
| TSG | Technical Support Group |
| TSG | ThermoSalinoGraph |
| TSG | Testing Solutions Group (software) |
| TSG | The Surgeon General |
| TSG | Traditional Speciality Guaranteed (EC) |
| TSG | The Speed Gamers |
| TSG | Twisted Gastrulation |
| TSG | Tourism and Government (Hawaii) |
| TSG | Tourism Sustainability Group (EU) |
| TSG | Telluride Ski & Golf (Telluride, CO) |
| TSG | Technical Steering Group |
| TSG | The SPECTRUM Group (Washington, DC; consulting firm) |
| TSG | Technical Solutions Group |
| TSG | Time-Sequence Graph |
| TSG | Teacher Study Group (model) |
| TSG | Toxics Steering Group (Michigan Department of Environmental Quality) |
| TSG | Tectonics/Structural Geology (various schools) |
| TSG | Theater Support Group (US Army) |
| TSG | Tactical Sound Garden (software) |
| TSG | Targeting Support Group (US DoD) |
| TSG | Telephone Support Group |
| TSG | Timing Signal Generator |
| TSG | Trouble Shooting Guide |
| TSG | Trustee Sale Guarantee (real estate, bankruptcy) |
| TSG | The Stomping Grounds |
| TSG | Tucson Show Guide (Tucson, AZ) |
| TSG | Technical Sergeant |
| TSG | The Stolen Generation |
| TSG | Terminal Server Gateway |
| TSG | Telephone Security Group |
| TSG | Police Territorial Support Group |
| TSG | The Special Goodness (band) |
| TSG | Technology and Standards Group (Advanced Television Systems Committee) |
| TSG | Technical Speleological Group (Derbyshire, UK) |
| TSG | Translation Services Gateway |
| TSG | Thunderbird Student Government (AGSIM, Glendale, AZ, USA) |
| TSG | Time Signal Generator |
| TSG | The Software Group, Inc. |
| TSG | Tactical Strategy Group, Inc |
| TSG | The Sundered Guard (gaming guild) |
| TSG | Trunk Subgroup |
| TSG | Technology Steering Group |
| TSG | The Schuster Group |
| TSG | The Showalter Group (Cincinnati, OH) |
| TSG | The Seminar Group |
| TSG | TMDE Support Group |
| TSG | Triplex Safety Glass |
| TSG | Telecommunications Systems Group |
| TSG | Tibetan Support Group |
| TSG | The Structures Group (Virginia) |
| TSG | Test Support Group |
| TSG | Technical School Graduate |
| TSG | Transmission Signaling Group |
| TSG | TRAP/TDDS Steering Group |
| TSG | Technical Standards & Guidelines |
| TSG | Triservice Group |
| TSG | Tracking Signal Generator |
| TSG | Tactical Shore Gateway (US DoD) |
| TSG | Tidal Study Group |
| TSG | Test and Switching Gear |
| TSG | The Super Gosu (online gaming clan) |
| TSG | Technology Survey Group (Columbia, MD) |
| TSG | Texas Systems Group (Austin, TX) |
| TSG | Train, Strangulate, Gnaw (World of Warcraft) |