| Subject | English | Thesaurus |
| tradem., abbr. | Advanced Photon Source - User Program Division | APS-UPD |
| comp., abbr. | End User Services | EUS |
| comp., abbr. | Installed User Program | IUP |
| telecom., abbr. | Integrated Services Digital Network User Part | ISDNUP |
| IT, abbr. | Integrated Services User Part | ISUP (ISDN) |
| IT, abbr. | Multi-user ??? Program for Microcomputers | MPM (CP/M, OS, DR) |
| IT, abbr. | Multi-user ??? Program for Microcomputers | MP/M (CP/M, OS, DR) |
| IT, abbr. | Multi-user ??? Program / NETwork | MPNET (MP/M, CP/NET, OS) |
| IT, abbr. | Multi-user ??? Program / NETwork | MP/NET (MP/M, CP/NET, OS) |
| abbr., astronaut. | RADARSAT User Development Program | RUDP |
| abbr., comp., net. | Remote Access Dial-In User Services | RADIUS |
| comp., net., abbr. | Remote Authentication Dial In User Services | RADIUS |
| USA | Solution User Options | SUO |
| IT, abbr. | user file-creation mask | umask |
| softw., abbr. | User Interface Program | UIP |
| comp., net., abbr. | User Interface Services | UIS |
| mil., abbr. | User Partnership Program | UPP |
| tradem., abbr. | User Program Division | UPD |
| IT, abbr. | User Program Language | UPL |
| softw., abbr. | User Program Module | UPM |
| comp., abbr. | User Program Switch Indicator | UPSI |
| softw., abbr. | User Program Version | UPV |
| busin., abbr. | User Services | US |
| abbr. | User Services and Systems Support | USSS |
| comp., net., abbr. | Web Services User Interface | WSUI |
