| Abbreviation | Definition |
|---|---|
| CRLX | Canadian Railserve Limited |
| CRLX | Centex Rail Link (Canadian Railserve) |
| CRMF | Commuter Rail Maintenance Facility |
| CRMS | Central Railway Mazdoor Sangh |
| CRMU | Conrail Mercury (ACE Engineering & Co.) |
| CRMU | Consolidated Rail Corporation |
| CRMX | MHC Incorporated - Subsidiary of Conagra Incorporated |
| CRMX | The Cropmate (JAIX Leasing) |
| CRMZ | Conrail Mercury (Norfolk Southern) |
| CRMZ | Consolidated Rail Corporation |
| CRN | Carolina and Northwestern Railway (Norfolk Southern) |
| CRN | Norfolk Southern Railway Company |
| CROX | Sylvachem Corporation |
| CRP | Central Railroad of Pennsylvania (Norfolk Southern) |
| CRPU | Conrail (CIMAR) |
| CRPU | Consolidated Rail Corporation |
| CRPX | Centennial Gas Liquide |
| CRPX | Centennial Gas Liquids (Southwest Rail Industries) |
| CRQU | Conrail (Norfolk Southern) |
| CRQU | Consolidated Rail Corporation |