| Link | Englisch | Deutsch |
| Tschebyscheff filter | Tschebyscheff-Filter | |
| tunable laser | Abstimmbarer Laser | |
| tunable wavelength converter | Abstimmbarer Wellenlängenkonverter | |
| tuner | Tuner | |
| tunnel diode | Tunneldiode | |
| tunneling | Tunneling | |
| tunneling magneto-resistive | TMR-Sensor | |
| turbo code | Turbo-Code | |
| turnkey solution | Turnkey-Solution | |
| TV cellphone | TV-Handy | |
| tweening | Tweening | |
| tweet | Tweet | |
| tweeter | Hochtöner | |
| twin lens reflex | Zwei-Linsen-Kamera | |
| twin LNB | Twin-LNB | |
| twin wire | Doppelader | |
| twinaxial cable | Twinaxial-Kabel | |
| twinaxial connector | Twinaxial-Stecker | |
| twisted nematic | TN-Technologie | |
| twisted pair | TP-Kabel | |
| twisted quad | Sternvierer | |
| two phase commit | Two-Phase-Commit | |
| two wave mixing | Zweiwellenmischung | |
| two wire cable | Zweidrahtleitung | |
| two wire serial interface | Zweidraht-Interface | |
| two-factor authentication | Zwei-Faktoren-Authentifizierung | |
| two-motion selector | Hebdrehwähler | |
| two-port network | Vierpol | |
| two-tier architecture | Two-Tier-Architektur | |
| two's complement | Zweierkomplement | |
| Twofish | Twofish |