| Abbreviation | Definition |
|---|---|
| USD | User Solution Definition |
| USD | User Supplementary Document |
| USD | User's Supplementary Documents |
| USE | Unified Search Environment |
| USENET | USEr NETwork |
| USF | User Setup File |
| USFM | Unified Standard Format Marker |
| USFS | User Supplied Format String |
| USL | User Subprogram Library |
| USM | UnSharp Masking |
| USMD | User Session Minimum Duration |
| USOC | User Support Operations Center |
| USR | Unix System Resources |
| USR | USeR |
| USS | Unix System Services |
| USSG | Unix Systems Support Group |
| UST | Unadjusted System Time |
| USV | Unterbrechungsfreie StromVersorgung |
| UT | Unit Test |
| UT | Universal Terminal |