| Abbreviation | Definition |
|---|---|
| PMSC | Purchasing and Materials Service Center |
| PN | Pitcairn |
| PND | Pond |
| PO | Post Office |
| PO | Postal Order |
| POD | Payment On Delivery |
| POM | Postal Operations Manual |
| POMIS | Post Office Monthly Income Scheme (India) |
| POP | Point Of Purchase promotion |
| POS | Point Of Sale system |
| POSKED | Post Office SCHEDuler |
| POSTNET | POSTal Numeric Encoding Technique |
| PPI | Pack Post Insurance |
| PR | Pier |
| PR | Poste Restante |
| PR | Puerto Rico |
| PRC | Postal Rate Commission |
| PRK | Park |
| PRN | Packaging Recycling Notes |
| PRN | Postal Routed Network |