| Abbreviation | Definition |
|---|---|
| PLU | Part Look Up |
| PLY | Percent Light Year |
| PM | Particle Measure |
| PM | Past Master |
| PM | Per Metre |
| Pm | petameter |
| Pm | petametre |
| pm | picometer |
| PM | Post Meridieum |
| PM | Post Mile |
| PMD | Pounds per Man per Day |
| PMH | Productive Machine Hours |
| PMP | Per Million of Population |
| pMU | Parametric Measurement Unit |
| PN | Pinch |
| PNT | Pint |
| PNZ | Percent Non Zero |
| PP | Length between Perpendiculars |
| PP | Page Or Pages |
| PP | Per Particle |