| Abbreviation | Definition |
|---|---|
| PTTX | TTX Corporation |
| PTVU | Piston Tank Corporation |
| PTXX | PTS Inc. |
| PTXX | PTS Incorporated |
| PUBX | Publicker Industries |
| PUBX | Publicker Industries Incorporated |
| PUCC | Port Utilities Commission of Charleston South Carolina |
| PURD | Perth Urban Rail Development |
| PVCU | Pac-Van |
| PVCX | BHP Cooper |
| PVCX | BHP Cooper Incorporated |
| PVFX | General Electric Rail Services Corporation |
| PVFX | General Electric Railcar Services Corporation |
| PVGX | General Electric Rail Services Corporation |
| PVGX | General Electric Railcar Services Corporation |
| PVRR | Pioneer Valley Railroad |
| PVRR | Pioneer Valley Railroad Company Incorporated |
| PVRX | Pook Valley Rail System |
| PVS | Pecos Valley Southern Railway |
| PVS | Pecos Valley Southern Railway Company |