| Abbreviation | Definition |
|---|---|
| CPDR | Carolina Piedmont Division/South Carolina Central Railroad Company |
| CPDR | Carolina Piedmont Railway |
| CPDU | Delaware and Hudson Railway (Canadian Pacific) |
| CPDU | Delaware and Hudson Railway Company Incorporated |
| CPDX | Chevron U. S. A. Incorporated |
| CPDX | Chevron USA |
| CPDZ | Delaware and Hudson Railway (Canadian Pacific) |
| CPDZ | Delaware and Hudson Railway Company Incorporated |
| CPGZ | ContainerPort Group |
| CPGZ | ContainerPort Group Incorporated |
| CPHX | Ontario Hydro |
| CPHX | Ontario Hydro (Ontario Power Generation) |
| CPI | Canadian Pacific Railway |
| CPIX | Continental Polymers (ICI Acrylics) |
| CPIX | ICI Acrylics Incorporated |
| CPKT | Canadian Pacific Transport |
| CPLJ | Camp Lejeune Railroad |
| CPLT | Camino, Placerville and Lake Tahoe Railroad |
| CPLX | CPLX Leasing |
| CPLX | CPLX Leasing Limited |