| Abbreviation | Definition |
|---|---|
| CWBX | C. W. Brooks Incorporated |
| CWCX | Canandaigua Wine |
| CWCX | Canandaigua Wine Company Incorporated |
| CWCY | Caldwell County Railroad |
| CWCY | Caldwell County Railroad Company |
| CWEX | Commonwealth Edison (Midwest Generation) |
| CWEX | Commonwealth Edison Company |
| CWH | Cornwells Heights Station (SEPTA Regional Rail - AMTK) |
| CWI | Chicago and Western Indiana Railroad |
| CWIU | Con-Way Intermodal |
| CWIZ | Con-Way Intermodal |
| CWMX | Chemical Waste Management |
| CWMX | Chemical Waste Management Incorporated |
| CWP | Chicago Rail Link |
| CWP | Chicago, West Pullman and Southern Railroad (Chicago Rail Link) |
| CWR | California Western Railroad (CWR) |
| CWR | continuously welded rail |
| CWR | CWR Incorporated |
| CWRC | Central Wisconsin Railroad |
| CWRL | Central Western Railway |