| Abbreviation | Definition |
|---|---|
| USEX | General Electric Railcar Services Corporation |
| USFU | United States Air Force |
| USFU | United States Department of Defense - Air Force |
| USG | Union Station Gateway |
| USGX | Union Sugar |
| USIX | Equistar Chemicals, L. P. |
| USIX | US Industrial Chemicals |
| USLF | St. Louis-San Francisco Railway (BNSF Railway) |
| USLRV | US Standard Light Rail Vehicle |
| USLU | United States Lines |
| USLU | United States Lines Incorporated |
| USLX | Evans Railcar Leasing (GE Rail Services) |
| USLX | General Electric Railcar Services Corporation |
| USLZ | United States Lines |
| USLZ | United States Lines Incorporated |
| USMU | United States Department of Defense - Marine Corps |
| USMU | US Department of Defense Marine Corps |
| USMX | U. S. Steel Mining Company, Incorporated |
| USMX | US Steel Mining |
| USNU | United States Department of Defense - Navy |