| Acronym | Definition |
|---|
| TMG | Threat Management Gateway (Microsoft) |
| TMG | Telemediengesetz |
| TMG | Trimethylglycine |
| TMG | The Master Genealogist |
| TMG | Timing |
| TMG | The Mountain Goats (band) |
| TMG | Tunisia Monitoring Group |
| TMG | Transition Monitoring Group |
| TMG | Toyota Motorsport GmbH (racing team) |
| TMG | Tele München Gruppe |
| TMG | Touring Motor Glider (aviation) |
| TMG | Traffic Management Group (Philippine Police) |
| TMG | Technology Manufacturing Group (Intel) |
| TMG | Trimethyl Gallium |
| TMG | Threat Management Group (Kuwait) |
| TMG | Technical Management Group |
| TMG | Trident Media Guard (France; est. 2002) |
| TMG | TransMoGrifier (language for writing recursive descent compilers) |
| TMG | Track Made Good (air navigation) |
| TMG | Tatar Mail Group |
| TMG | Thermal Methods Group (Royal Society of Chemistry) |
| TMG | The Marshall Group |
| TMG | Text to Matrix Generator (MATLAB toolbox) |
| TMG | Thermal Model Generator |
| TMG | Tactical Multinet Gateway |
| TMG | Tactical Missile Group (US Air Force) |
| TMG | Test Management Group |
| TMG | The Married Gamers |
| TMG | Technical Monitoring Group |
| TMG | Test Message Generator |
| TMG | Tribal Management Grants |
| TMG | The Market Guys (investment educators) |
| TMG | Tetramethylgermanium |
| TMG | The Musicland Group, Inc. |
| TMG | TRADOC Manpower Guidance |
| TMG | Travel Maritime Group (Monaco; est. 1996) |
| TMG | Tactical Management Gateway |
| TMG | Technology and Material Game (US Army) |
| TMG | The Modern Gamer (website) |
| TMG | Trader Media Group (UK) |
| TMG | Telegraph Media Group (UK) |
| TMG | The Margarita Guys, LLC (California) |
| TMG | The Members Group (financial services) |
| TMG | Techniques and Methodologies Group |