| Subject | English | Thesaurus |
| railw., abbr. | APL Land Transport Services Incorporated | APLX |
| railw., abbr. | Carolina Rail Services Incorporated | CRIJ |
| railw., abbr. | Central and South West Services Incorporated | CSWX |
| railw., abbr. | Excel Railcar Services Incorporated | ERSX |
| tradem., abbr. | Foundation Services, Incorporated | FSI |
| railw., abbr. | Glacier State Distribution Services Incorporated | GLSX |
| tradem., abbr. | Government Technology Services, Incorporated | GTSI |
| railw., abbr. | Heritage Environmental Services Incorporated | HESU |
| railw., abbr. | Heritage Environmental Services Incorporated | HESZ |
| railw., abbr. | Heritage Environmental Services Incorporated | HESX |
| railw., abbr. | KND Rail Services Incorporated | KNDX |
| railw., abbr. | Laidlaw Environmental Services Incorporated | UPCX |
| tradem., abbr. | Management Services Incorporated | MSI |
| railw., abbr. | Mile-High Railcar Services Incorporated | MHRX |
| railw., abbr. | Mile-High Railcar Services Incorporated | MRSX |
| railw., abbr. | Nautilus Leasing Services Incorporated | NLSU |
| railw., abbr. | Northwest Container Services Incorporated | NCWX |
| railw., abbr. | Northwest Container Services Incorporated | NWCX |
| railw., abbr. | On-Track Railcar Services Incorporated | HRRX |
| railw., abbr. | On-Track Railcar Services Incorporated | ONTX |
| railw., abbr. | Pacific Rail Dismantling Services Incorporated | PRDX |
| tradem., abbr. | Race Services Incorporated | RSI |
| railw., abbr. | Rail Container Services Incorporated | RCSZ |
| railw., abbr. | Rail Transportation Services Incorporated | RTSX |
| tradem., abbr. | Resource Services Incorporated | RSI |
| railw., abbr. | San Francisco Transportation Services Company Incorporated | SFSX |
| IT, abbr. | Space Services Incorporated | SSI (Corporate name, Space) |
| abbr., astronaut. | Space Services Incorporated | SSI |
| railw., abbr. | Transportation Management Services Incorporated | NERX |
| railw., abbr. | U S A Waste Services, Incorporated | USWX |
| railw., abbr. | Yellow Freight Services Incorporated | YFSZ |
