| Meaning | Category |
| Table of Distribution and Allowances | Governmental->Military |
| Tactical Decision Aid | Academic & Science->Meteorology Governmental->Military |
| Tactile Digital Assistant | Business->Positions |
| Take and Drive Away | Governmental->Police |
| Target Damage Assessment | Governmental->Military |
| Tax Deferred Annuity | Business->Stock Exchange |
| Team Disney Anaheim | Business->Firms |
| Technical Direction Agency | Governmental->Military |
| Technological Display of Affection | Miscellaneous->Funnies |
| Telecommunications Delivery Americas | Business->Firms |
| Telecommunications and Data Acquisition | Governmental->NASA |
| Temporal Data Authority | Computing->Networking |
| Tornado Detection Algorithm | Academic & Science->Ocean Science |
| Total Drama Action | Community->Media |
| Trade Development Agency | Business->International Business |
| Trade and Development Agency | Governmental->US Government |
| Trail Drivers Association | Community->Sports |
| Train Dynamics Analyzer | Governmental->Transportation |
| Trinidad, Colombia | Regional->Airport Codes |
| Tru Dat Allstars | Community->Sports |
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