| Abbreviation | Definition |
|---|---|
| UHB | Ultra- High Bandwidth |
| UHD | User´s Help Desk |
| UHH | Unix-Haters Handbook |
| UHO | User Home Organization |
| UI | User Interface |
| UID | User IDentification |
| UID | User Interface Description |
| UIE | User Interface Engineering |
| UIM | User Interaction Management |
| UIO | Universal Input Output |
| UIP | User Interface Process |
| UIQ | User Interface Query |
| UISL | User Interface Standard Library |
| UKP | Ubiquitous Knowledge Processing |
| UL | Universal Library |
| UL | Unnumbered List |
| UL | Unsorted List |
| ULD | User Language Definition |
| ULP | User Language Programming |
| ULS | Universal Licensing System |