| Abbreviation | Definition |
|---|---|
| TUD | Tatung Ulta-Dense Server |
| TUI | Tangible User Interface |
| TVA | Time Variant Amplifier |
| TVF | Telechip Voice File |
| TVL | TeleVision Lines (horizontal resolution) |
| TVM | Tape Volume Management |
| TVMS | Tape Volume Management System |
| TVSW | TeleVision SWivel mount |
| TXDO | Transmit Data |
| TXT | Trusted eXecution Technology (Intel) |
| TYDAC | Typical Digital Automatic Computer |
| U | Integrated circuit (circuit diagram marking) |
| U | Unwind tape |
| UAB | Universal Audio Board |
| UACU | User Adjustable Control Unit |
| UBER | Uncorrectable Bit Error Rate |
| UC | Unique Configuration |
| UCA | Utility Communication Architecture |
| UCFF | Ultra Compact Form Factor |
| UCP | Unit Control Panel |