| Abbreviation | Definition |
|---|---|
| PF | French Polynesia |
| PG | Papua New Guinea |
| PH | Penthouse |
| PH | Philippines |
| PHQ | Postal HeadQuarters |
| PIRS | Productivity Information Reporting System |
| PIVMS | Powered Industrial Vehicle Management System |
| PK | Park |
| PKG | Package |
| PKGD | Packaged |
| PKT | Packet |
| PKWY | ParkWay |
| PL | Poland |
| PLC | Place |
| PM | Project Manager |
| PM | St. Pierre and Miquelon |
| PMC | Postage and Mailing Center |
| PMG | PostMaster General |
| PMI | Priority Mail International |
| PMS | Perfect Mail Service |