| Meaning | Category |
| TüRkiye Denizcilik Isletmeleri | International->Turkish |
| TDI Animation Image file | Computing->File Extensions |
| Tape Deck Included | Community->Media |
| Team Descent Invaders | Community->Sports |
| Techical Document Issue | Computing->Software |
| Technical Diving International | Business->Firms |
| Technology Demonstration Item | Governmental->Military |
| Therapy Dogs International | Community->Non-Profit Organizations Miscellaneous->Dogs Related |
| Threat, Duress, and Intimidation | Governmental->Police |
| Time Delay Integration | Academic & Science->Mathematics |
| Time Domain Integration | Academic & Science->Electronics |
| Toluene Diisocyanate | Academic & Science->Chemistry |
| Toronto Dance Industry | Community->Performing Arts |
| Totally Disrepectful and Impolite | Governmental->Police |
| Tournament Darts International | Community->Sports |
| Transport Driver Interface | Computing->Networking Computing->Drivers |
| Turbo Diesel I | Governmental->Transportation |
| Turbo Diesel Injection | Governmental->Transportation |
| Turbo Direct Inject | Governmental->Transportation |
| Turbo Direct Injected | Business->Products |
| Turbo Direct Injection | Governmental->Transportation |
| Turbocharged Diesel Injection | Business->Products |
| Turbocharged Direct Injection | Governmental->Transportation |
| Twin Disc, Inc. | Business->NYSE Symbols |
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