| T&CG | Tasking and Coordination Group 
| Others |
| TCG | Tacheng, Mainland China
| Others |
| TCG | Tactical Communications Group
| Others |
| TCG | Tactical Control Group
| Others |
| TCG | tal Commitment Guaranteed
| Others |
| TCG | Tan Chen Geok
| Others |
| TCG | Tasking and Coordinating Group
| Others |
| TCG | Technical Chamber of Greece
| Others |
| TCG | Technical Cooperation Group
| Others |
| TCG | Technical Coordination Group
| Others |
| TCG | Technology Commercialization Group
| Others |
| TCG | Technology Conservation Group
| Others |
| TCG | Technology Consulting Group
| Others |
| TCG | Technology Coordination Group
| Others |
| TCG | Telecom Consulting Group
| Others |
| TCG | Teleport Communications Group
| Others |
| TCG | Tennessee Contest Group
| Others |
| TCG | Test Call Generation
| Others |
| TCG | Test Control Group
| Others |
| TCG | Thanh Cong Group
| Others |
| TCG | The Car Guide
| Others |
| TCG | The Chasm Group
| Others |
| TCG | The Cheetah Girls
| Others |
| TCG | The Chernin Group
| Others |
| TCG | The Christian Gathering
| Others |
| TCG | The Columbia Group
| Others |
| TCG | The Commerce Guild
| Others |
| TCG | The Community Group
| Others |
| TCG | The Corridor Group
| Others |
| TCG | The Creative Group
| Others |
| TCG | Theatre Communications Group
| Others |
| TCG | Thermo Conversions Gasifi
| Others |
| TCG | Thoroughly Crafted Goods
| Others |
| TCG | Threat Coordinating Group
| Others |
| TCG | Threats and Countermeasures Guide
| Others |
| TCG | Time Code Generator
| Others |
| TCG | Tiny Code Generator
| Others |
| TCG | Tongan Crip Gang
| Others |
| TCG | Topical Classification Guide
| Others |
| TCG | Tradable Card Game
| Others |
| TCG | Trading Card Game
| Others |
| TCG | Trading Card Games
| Others |
| TCG | Training Card Game
| Others |
| TCG | Transformers Card Game
| Others |
| TCG | TravelChinaGuide
| Others |
| TCG | Triple Chip Grind
| Others |
| TCG | Troop Carrier Group
| Others |
| TCG | Trusted Capital Group
| Others |
| TCG | Trusted Computer Group
| Others |
| TCG | Trusted Computing Group
| Others |
| TCG | Tucson Cornelia and Gila Bend Railroad Company
| Others |
| TCG | Tucson, Cornelia and Gila Bend Railroad
| Others |
| TCG | Tumbling, Cheerleading, and Gymnastics
| Others |
| TCG | Turath Conservation Group
| Others |
| TCG | Turner Communications Group
| Others |