| Abbreviation | Definition |
|---|---|
| USB | Alternate Storage Memory |
| USCT | USB to Serial Cable "T" Adaptor |
| USI | Universal Serial Interface |
| USIB | Universal Storage Interface Bus |
| USIT | User System Interaction Technology |
| USWC | Uncacheable Speculative Write Combining |
| UT | Unit Tape |
| UTA | Unified Test Architecture |
| UTL | Ultrasonic Tape Lamination |
| UTL | Unable To Lift |
| UU | Under-Used |
| UUI | Universal User Interface |
| UVC | Universal Virtual Computer |
| UVEPROM | UltraViolet Erasable Programmable Read-Only Memory |
| UVK | Universal Virtual Keyboard |
| UVLO | Undervoltage-Lockout |
| UVM | Universal Voice Module |
| UVS | Unified Virtual Storage |
| UXGA | Ultra eXtended Graphics Array |
| UZE | Universal Z80 Engine |