| Abbreviation | Definition |
|---|---|
| UPB | Ultimate PHP Board |
| UPC | Universal Product Code |
| UPE | Unix Programming Environment |
| UPE | User Portability Extension |
| UPF | Universal Preservation Format |
| UPO | Uni- Processor Order |
| UPP | Unix Product Poll |
| UPQ | Uninterruptible Power Quality |
| UPS | Ultra Power Saver |
| UPS | User Profile Store |
| UPSI | User Program Switch Indicator |
| UPT | User Profile Template |
| UQ | Ultra Quality |
| UQ | User Quiz |
| UQA | User's Questions and Answers |
| UQF | User's Questions Forum |
| UQG | User's Questions Group |
| UQL | UML Query Language |
| UQL | Universal Query Language |
| UQL | Universal relation Query Language |