| Abbreviation | Definition |
|---|---|
| TN | Truncated Normal |
| TNT | Tips N Tricks |
| TOA | Table Of Authorities |
| TOD | TO Dvorak |
| TOM | Top Of Memory |
| TOQ | To Qwerty |
| TOS | Terminate On Save |
| TOS | Top Of Stack |
| TOY | TO Querty |
| TPU | Turbo Pascal Unit |
| TROSA | Transmit Receive Optical Sub Assembly |
| TRRA | Three Rivers Regional Assembly |
| TS | Tilt and Shift |
| TSR | Terminate Safety Return |
| TSR | Top Structure Rename |
| TSTA | Tritium Systems Test Assembly |
| TT | Teletype Text |
| TU | To Unix |
| TUL | Timed Unsigned Long |
| TW | Time Wait |