| Abbreviation | Definition |
|---|---|
| PLCX | Pullman Leasing (GE Capital Railcar Services) |
| PLE | Pittsburgh and Lake Erie Railroad (CSX Transportation) |
| PLE | Youngstown and Southern Railway Company |
| PLEX | CIT Group |
| PLEX | PLM International Incorporated |
| PLGU | Gulbrandsen Companies |
| PLHZ | Pole Star Transport |
| PLIX | Polymont Plastics Corporation |
| PLIZ | P and L Intermodal Corporation |
| PLLU | Polynesia Line |
| PLLU | Polynesia Line Limited |
| PLLZ | Polynesia Line |
| PLLZ | Polynesia Line Limited |
| PLMX | PLM International |
| PLMX | PLM International Incorporated |
| PLNZ | Penske Logistics |
| PLRU | Pic Leasing Corporation |
| PLRX | PIC Trans |
| PLRX | PIC Trans Incorporated |
| PLUX | Pulser Equipment Corporation |