1 | QRSM | QRS | | | SCAC4 |
2 | QRSX | Quality Railway Services & Supply Co. | 7/2000; eliminated 7/2001; added 10/2001; 7/2005; eliminated 4/2007 | | NAKINA |
3 | QRSX | Quality Railway Services & Supply Co. | 7/2000; eliminated 7/2001 | | NRHS |
4 | QRSX | QUALITY RAILWAY SERVICES & SUPPLY COMPANY | | | PWRC |
5 | QRSX | Quality Railway Services and Supply | | | RSRV |
6 | QRSX | QUALITY RAILWAY SERVICES & SUPPLY C | | | SCAC4 |