| Abbreviation | Designation | |
|---|---|---|
| PR | ProRail | railway company |
| PR | Przewozy Regionalne, Przewozy Regionalne Sp. z o.o. (Polish) | railway company |
| P.St.B. | Preußische Staatseisenbahnen (German) Prussian state railways | railway company |
| PR | Prism Rail, Prism Rail PLC | railway company |
| PR | Przewozy Regionalne, PKP Przewozy Regionalne Sp. z o.o. (Polish) | railway company |