| TTY |
Teletype (Fernschreiber) |
| TU |
Tributary Unit |
| TUBA |
TCP and UDP with Big/Bigger Addresses |
| TUEB |
Temex-Uebertragungsbaugruppe |
| TUG |
Tributary Unit Group |
| TUG |
TeX User Group |
| TUHS |
The UNIX Heritage Society |
| TUI |
Text User Interface |
| TULIP |
TCP and UDP over Lightweight IP |
| TUP |
Telephone User Port |
| TUSTEP |
Tübinger System von Textverarbeitungsprogrammen |
| TV |
Television |
| TVC |
Transient Virtual Channel |
| TVI |
Television Interference |
| TVOL |
TV Online Cable Service |
| TVR |
Temex-Vermittlungsrechner |
| TVST |
Teilnehmer-Vermittlungsstelle |
| TVX |
Valid Transmission Time/Timer |
| TWAIN |
Technology Without An Interesting Name |
| TWINKLE |
The Weizman Institute Key Locating Engine |
| TWIRP |
Two Way Infrared Protocol |
| TWSC |
Team World Service Center |
| TWX |
Twinax (Cable) |
| TWX |
Teletypewriter Exchange Service |
| TX |
Telex (Fernschreiben) |
| TX |
transmit, Transmitter |
| TXC |
Transmit Clock |
| TXD |
Transmitter Delay |
| TXD |
Tranmitted Data |
| U |
Ultra-, Uniform, Universal, Unix, User |
| UA |
Upgrade Advantage |
| UA |
Unnumbered Acknowledgement (frame) |
| UA |
User Area/Agent (OSI) |
| UAA |
Universally Administered Address |
| UAC |
Unbalanced Asynchronous Class |
| UAE |
Unrecoverable Application Error |
| UAE |
Universelle Anschlusseinrichtung |
| UAF |
User Authorization File |
| UAM |
User Authentication Method/Module |
| UART |
Universal Asynchronous Receiver Transmitter |
| UAWG |
Universal ADSL Working Group |
| UBC |
Unified Buffer Cache |
| UBC |
University of British Columbia |
| UBE |
Unsolicited Bulk Electronic Mail |
| UBR |
Unspecified/Undefined Bit Rate |
| UC |
Ubiquitous Computing |
| UC |
Upper Case |
| UC |
Universal Code |
| UCAID |
University Corporation for Advanced Internet Development |
| UCAR |
University Corporation for Atmospheric Research |