| Tsukuba Advanced Computing Center | Academic & Science |
| Texas Association of Community Colleges | Academic & Science |
| Texas Advanced Computing Center | Academic & Science |
| Theoretical and Applied Cosmic Cybernetics | Academic & Science |
| Territorial Approach to Climate Change | Academic & Science |
| Thai American Chamber of Commerce | Business |
| Tunisian American Chamber of Commerce | Business |
| Technology Access Community Center | Community |
| Turkish American Community Center | Community |
| Turkish American Cultural Center | Community |
| Transformation, Aggregation, Caching, and Customization | Computing |
| Torsby American Car Club | General |
| Thumpers American Car Club | General |
| Thumb Antique Car Club | General |
| Traffic Aware Cruise Control | General |
| Tuscaloosa Antique and Classic Car Club | General |
| Training for Automotive Companies Creation | General |
| Toyota Auto Club Cebu | General |
| Total Annihilation Conflict Crusher | General |
| Tennessee Association of Construction Counsel | General |
| The American City Coalition | General |
| Technical Assistance Coordinating Center | General |
| tal Allowable Commercial Catch | General |
| Tuning and customizing cars | General |
| Transforming Acidic Coiled Coil | General |
| Texas ACG Capital Connection | General |
| Tasa Anual de Crecimiento Compuesto | General |
| Transportation Administration of Cleveland County | Governmental |
| Tactical Air Control Center | Governmental |
| Territorial Army Commissioning Course | Governmental |
| Tanker Airlift Control Center | Governmental |
| Tactical Air Command Center (USMC) | Governmental |
| Training And Counseling Center | Governmental |
| Turkish American Chamber of Commerce | Governmental |
| Triple A Council of California | Governmental |
| Thunderbird Arena Community Council | Governmental |
| Texas Agricultural Cooperative Council | Governmental |
| Tufts Animal Care and Condition | Medical |
