| Subject | English | Thesaurus |
| abbr. | Air Transport Users Council | AUC (Anglophile) |
| telecom., abbr. | Broadband ISDN User Part | B-ISUP (SS7) |
| IT, abbr. | Broadband ISDN User's Part | BISUP (B-ISDN) |
| IT, abbr. | Broadband ISDN User's Part | B-ISUP (B-ISDN) |
| mil., abbr. | Common Part User | CPU |
| abbr., IT | Data User Part | DUP |
| telecom., abbr. | Integrated Services Digital Network User Part | ISDNUP |
| IT, abbr. | Integrated Services User Part | ISUP (ISDN) |
| IT, abbr. | ISDN User Part | ISDNUP (ISDN, GSM, Mobile-Systems) |
| IT, abbr. | ISDN User Part | ISDN-UP (ISDN, GSM, Mobile-Systems) |
| abbr., IT | ISDN User Part | ISDN-UP |
| telecom., abbr. | ISDN User Part | ISUP (SS7) |
| comp., abbr. | ISDN user part | ISUP |
| comp., abbr. | Java User Migration Path | JUMP |
| bank. | on-us transactions | on-us-txn (Ker-online) |
| abbr., IT | Telephone User Part | TUP |
| telecom., abbr. | Telephone User Part | TUP (SS7) |
| IT, abbr. | Telephone User Path | TUP (ISDN) |
| abbr., file.ext. | Text-Based User Interface | TUI (WordPerfect) |
| IT, abbr. | Text-Based User Interface | TUI (UI) |
| comp., abbr. | Text-based User Interface | TUI |
| abbr., law | US CIT | United States Court of International Trade |
| abbr., law | US CITRAL | United States Commission on International Trade Law |
| abbr., law | US DOC | United States Department of Commerce |
| abbr., law | US ITC | United States International Trade Commission |
| abbr., law | US TR | United States Trade Representatives |
| NASA, abbr. | User Unit of Work | UUW |
| abbr., progr. | user work station | user workstation (ssn) |
| abbr., progr. | user work station | user work-station (ssn) |
| abbr., progr. | user work-station | user workstation (ssn) |
| abbr., progr. | user work-station | user work station (ssn) |
| d.b.., abbr. | Wisconsin's DB2 User Group | WDUG |