| UOM | Category | Short Description | Long Description |
|---|---|---|---|
| OM | SPREST | Ohm*m | Specific Electrical Resistance |
| OZ | MASS | Ounce | Ounce |
| OZA | VOLUME | Fld.oz US | Fluid ounce (US) |
| P | POINTS | Points | Points |
| PA | PRESS | Pa | Pascal |
| PAA | AAAADL | Pair | Pair |
| PAK | AAAADL | Pack | Pack |
| PAL | AAAADL | Pallet | Pallet |
| PAS | VISDYN | Pascal sec | Pascal second |
| PCT | AAAADL | Group prop | Group proportion |
| PDA | TIME | Cons. Days | Consultant Days |
| PMI | FREQU | 1/min | 1/minute |
| PMR | PERMEA | kg/m2*s | Permeation Rate SI |
| PPB | PROPOR | ppb | Parts per billion |
| PPM | PROPOR | ppm | Part per million |
| PPT | PROPOR | ppt | Parts per trillion |
| pQ | DENSI | pg/m3 | Picogram/Cubic Meter |
| PRM | PERMEA | ug/cm2*min | Permeation Rate |