P class
- DSB class P
- NER Class P
- NZR P class (1876)
- NZR P class (1885)
- P (complexity)
- P-class Melbourne tram
- P-class Sydney tram
- P-class cruiser
- P-class destroyer
- P-class sailing dinghy
- P-class sloop
- P-class submarine (disambiguation)
- Palestine Railways P class
- Pelorus-class cruiser
- SECR P class
- V/Line P class
- WAGR P Class