| Abbreviation | Definition |
|---|---|
| UFD | USB (Universal Serial Bus) Flash Drive |
| UFI | User-Friendly Interface |
| UFS | Ultra-Fast Scan |
| UFSB | Universal Fast Setting Box |
| UFX | Universal Effects |
| UHDL | Unified Hardware Description Language |
| UIM | Unit Information Module |
| UKB | USB (Universal Serial Bus) KeyBoard |
| UL | Ultra Latency |
| ULB | Universal Lighting Board |
| ULSI | Ultra-Large-Scale Integration |
| ULW | Ultra Long Word |
| UM | Universal Machine |
| UMA | Uniform Memory Architecture |
| UMD | Uninterruptible Motor Drive |
| UMD | Universal Media Disc |
| UMJ | Universal Modular Jack |
| UMK | User Maintenance Kit |
| UMLER | Universal Machine Language Equipment Register |
| UMPC | Ultra-Mobile Personal Compute |