| Abbreviation | Definition |
|---|---|
| TSB | Technical Service Bulletin |
| TS-CAL | Terminal Services - Client Access License |
| TSCP | Transatlantic Secure Collaboration Program |
| TSD | Tempus System Definition |
| TSD | Textual System Definition |
| TSL | Terminal System Language |
| TSM | Text Services Manager |
| TSM | Total Solution Maintenance |
| TSO | Terminal System Operation |
| TSP | Tapi Service Provider |
| TSP | Team Software Processes |
| TSP | The Spamhaus Project |
| TSQ | Technical Support Questionnaire |
| TSRGD | Traffic Signs Regulations and General Directions |
| TSS | The Screen Savers |
| TSS | Tiff Stack Subsampler |
| TSTD | Too Scared To Delete |
| TT | Transverse Traceless |
| TT | Trouble Ticket |
| TT | Typewriter Text |