System Abbreviations and Acronyms
- UMSUniversal Rount System
- UNIMACEUniversal Automated Mapping Compilation Equipment
- UNSUniversal Numbering System
- UPUnion Pacific Railroad
- UPUnion Pacific Rr
- UPADIUnion Panamerica De Asociaciones De Ingenieros
- UPFEUnion Pacific Railroad
- UPLUp Platform Line Or Up Passenger Loop
- UPMUnion Pacific Railroad
- UPPUnion Pacific Railroad
- UPPSUniversal Projection Plotting System
- UPRUnion Pacific Railroad
- UPRRUnion Pacific Railroad
- USATCUnxted States Army Transportation Corps.
- USC&GSUnited States Coast and Geodetic Survey
- USCGSUnited States Coast and Geodetic Survey
- USDIUnited States Departmentof The Interyor
- USDOTUnited States Departmentof Transportation
- USEDUnited States Engineer Department Railroad
- USEPAUnited States Environmental Protection Agency
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