| Abbreviation | Definition |
|---|---|
| PNL | Pacific Northwest National Laboratory |
| PNSSR | Part Number Supply Support Request |
| PNT | Pacific Northwest Trail |
| PNT | Pentagon |
| PNTR | Permanent Normal Trade Relations |
| PO | Political Outlines |
| PO | Post Office |
| PO&AM | Plan of Action and Milestones |
| POA | Percent Open Area |
| POA | Purchase Order Agreement |
| POA&M | Plan of Action Milestones |
| POA&M | Plan of Action & Milestones |
| POAM | Plan Of Action and Milestones |
| POB | Place of Birth |
| POB | Post Office box |
| POC | Purchase Order Confirmation |
| POD | Payable On Death |
| POE | Point of Entry |
| POE | point of exit |
| POE | Port Of Entry |