| 1 | USOI | U S ONE (1) EXPRESS INC | | | SCAC4 |
| 2 | USON | US ONE (1) LOGISTICS LLC | | | SCAC4 |
| 3 | USOP | US ONE (1) CORP | | | SCAC4 |
| 4 | USOS | U S CONTAINER SYSTEMS INC | | | SCAC4 |
| 5 | USOX | War Dept., U.S.A., Quartermaster Corps | 1/1943 | | NAKINA |
| 6 | USOX | War Dept., U.S.A., Office of the Chief of Transportation | 1/1945-4/1947 | | NAKINA |
| 7 | USOX | Dept. of the Army, Office of the Chief of Transportation, Movements Division, Tank Car Section | 1/1950-1/1952 | | NAKINA |
| 8 | USOX | Dept. of the Army | added 7/1953 | | NAKINA |
| 9 | USOX | Dept. of the Army, Office of the Chief of Transportation, Railway Transport Service Division | 7/1954 | | NAKINA |
| 10 | USOX | Department of the Army, Transportation Materiel Command, Marietta, Pennsylvania | eliminated 10/1955 | | NAKINA |
| 11 | USOX | Department of the Army, Transportation Supply and Maintenance Command, St. Louis 1, Missouri | added 10/1955; eliminated 10/1956 | | NAKINA |
| 12 | USOX | Dept. of the Army, Office of the Chief of Transportation, Movements Division, Tank Car Section | Jan-52 | | NRHS |
| 13 | USOX | U.S. DEPARTMENT OF DEFENSE - ARMY | | | PWRC |
| 14 | USOY | USA OPPORTUNITY | | | SCAC4 |
| 15 | USOZ | U. S. STEEL MINNESOTA OIL OPERATION | | | PWRC |
