| Abbreviation | Definition |
|---|---|
| TIPS | Trim Integration Product Suite |
| TIRFU | This Is Really Fouled Up |
| TIS | Televic Interpretation System |
| TISR | Timer Interrupt Service Routine |
| TIV | Tivoli |
| TJOS | TeeJay Operation System |
| TKW | TreeKeeper for Windows |
| TL | Target Language |
| TL | Top Level |
| TLA | Text Link Ads |
| TLB | True Launch Bar |
| TLC | Tamil Language Communications |
| TLC | Three Letter Code |
| TLE | Thai Linux Extension |
| TLK | Technology Licensing Kit |
| TLMC | Transport Layer Multicaster Client |
| TLO | Technology Licensing Organization |
| TLP | Total Language Processor |
| TLP | Transactional Licensing Program |
| TLR | Top Level Requirement |