| Meaning | Category |
| Sandefjord, Norway | Regional->Airport Codes |
| Tamiya Racing Factory | Business->Firms |
| Technology Resource Fee | Academic & Science->Universities |
| Templeton Russia Fund, Inc. | Business->NYSE Symbols |
| Tempus Recorder File | Computing->Software |
| Tetsuya Rave Factory | Business->Firms |
| Texas Renaissance Festival | Community |
| The Rotary Foundation | Community->Non-Profit Organizations |
| Thyrotropin-Releasing Factor | Medical->Physiology |
| Tk Rave Factory | Business->Firms |
| Transition Reflection Formalism | Academic & Science->Electronics |
| Transmit Reject Filter | Computing->Telecom |
| Tropical Rain Forest | Academic & Science->Botany |
| Tuned Radio Frequency | Governmental->Military Governmental->NASA |
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