| Abbreviation | Definition |
|---|---|
| BXBX | BXB Corporation |
| BXDT | Boxcar Detector |
| BXN | Bauxite and Northern Railway |
| BXN | Bauxite and Northern Railway Company |
| BYCX | Battle Ground Yacolt and Chelatchie Prairie Railroad |
| C&FW | Chicago and Far Western Railroad |
| CA | Chesapeake and Albemarle Railroad |
| CAAU | Cai International |
| CAAX | MHC Incorporated - Subsidiary of Conagra Incorporated |
| CABU | Bacardi and Company Limited |
| CABU | Chakiat Agencies |
| CABX | Cabot Corporation |
| CACV | Cooperstown and Charlotte Valley Railway |
| CACZ | Comacasa Line |
| CACZ | Comcast Line |
| CAD | Cadiz Railroad |
| CADX | Cando Corporation |
| CAEG | Coffeen and Western Railroad (Ameren) |
| CAFU | Bay Cities Leasing |
| CAFU | Bay Cities Leasing Company |