| Abbreviation | Definition |
|---|---|
| PCHX | Poole Chemical |
| PCHX | Poole Chemical Incorporated |
| PCIX | ACF Industries Incorporated |
| PCIX | ACF Industries Shippers Car Line Division |
| PCJU | Puma Containers |
| PCJU | Puma Containers (Jersey) Limited |
| PCLU | Maritime Container Lines Limited |
| PCMX | Petro-Chem Marketing |
| PCN | Point Comfort and Northern Railway |
| PCNZ | Flexi-Van Leasing |
| PCRC | Panama Canal Railway (Kansas City Southern Railway) |
| PCRX | Pacer Rail Services L. L. C. |
| PCSX | GE Rail Services |
| PCSX | PLM International Incorporated |
| PCTX | Pioneer Cement Company of Texas |
| PCTX | Pioneer Cement of Texas |
| PCU | Passenger Car Unit |
| PCY | Pittsburgh Chartiers and Youghiogheny Railway Company |
| PCY | Pittsburgh, Chartiers and Youghiogheny Railway |
| PDIZ | Produce Distributors |