| Twin Disc, Inc. | Business |
| Technical Diving International | Business |
| Turbocharged Diesel Injection | Business |
| Turbo Direct Injected | Business |
| True Data India | Business |
| Tidewater Investments Ltd | Business |
| Technical Directions Inc | Business |
| Technical Devices Inc | Business |
| Toluene Di-isocyanate | Chemistry |
| Tape Deck Included | Community |
| Toronto Dance Industry | Community |
| Total Drama Island | Community |
| Test Development Innovators | Community |
| Transformative Development Initiative | Community |
| Trade Data Interchange | Computing |
| Tivoli Directory Integrator | Computing |
| Tool Data Interface | Computing |
| Transit Delay Indication | Computing |
| Transport Data Interface | Computing |
| Transport Device Interface | Computing |
| Time Domain Integration | Electronics |
| Test Data Input | Electronics |
| Tdi Animation Image File | File Type |
| Turbo Diesel Intercooled | General |
| Turbo Diesel Intercooler | General |
| Toyota Direct Ignition | General |
| Tire Defect Indicator | General |
| Transportation and Development Institute | General |
| Truck Driver Institute | General |
| Taft Diesel Indonesia | General |
| Torque Developments International | General |
| Therapy Dogs International | General |
| Time Delay and Integration | General |
| Tailored Datacenter Integration | General |
| toluene diisocyanate and is | General |
| Teamwork Discovery And Innovation | General |
| Turbo Diesel Inside | General |
| Toluene Diisocyanate Is | General |
| Treatment Demand Indicator | General |
| Trenton Digital Initiative | General |
| Transformation Data Informatisation | General |
| Turbo Diesel Injection | Governmental |
| Turbo Direct Injection | Governmental |
| Turbo Direct Inject | Governmental |
| Turbo Diesel I | Governmental |
| Threat, Duress, and Intimidation | Governmental |
| Totally Disrepectful and Impolite | Governmental |
| Tolerable Daily Intake | Governmental |
| The Dartmouth Institute | Governmental |
| Therapy Development Institute | Governmental |
| Tactical Defense Institute | Governmental |
| Texas Department of Insurance | Insurance |
| Temporary Disability Insurance | Insurance |
| TüRkiye Denizcilik Isletmeleri | International |
| Time Delay Integration | Maths |
| Technology Demonstration Item | Military and Defence |
| Transport Driver Interface | Networking |
| Techical Document Issue | Softwares |
| Tournament Darts International | Sports |
| Team Descent Invaders | Sports |
| Turbocharged Direct Injection | Technology |
