| Abbreviation | Definition |
|---|---|
| PM | Process Manager |
| PMC | Pacific Marine Center |
| PME | Personnel Management Evaluation |
| PMEL | Pacific Marine Environmental Laboratory |
| PMF | Probable Maximum Flood |
| PMIP | Paleoclimate Modeling Intercomparison Project |
| PML | Plymouth Marine Laboratory |
| PMRC | Proctor Maple Research Center |
| PMRS | Performance Management and Recognition System |
| PNA | Pacific/ North American |
| PNA | Parties to the Nauru Agreement |
| PNSN | Pacific Northwest Seismograph Network |
| PO | Pacific Ocean |
| POAM | Polar Ozone and Aerosol Measurement |
| POC | Particulate Organic Carbon |
| POCM | Parallel Ocean Climate Model |
| POD | Probability Of Detection |
| POD | Protective Oceanic Device |
| POD | Proton Omnidirectional Detector |
| PODAG | Polar DAAC ( Distributed Active Archive Center) Advisory Group |