| Abbreviation | Definition |
|---|---|
| PSA | Public Service Announcement |
| PSAR | Pennsylvania State Association of Retirees |
| PSBA | Pennsylvania State Beekeepers Association |
| PSIDS | Pacific Small Island Developing States |
| PSIDS | Pacific Small Island Development States |
| PSIDS | Pacific Small Islands Developing States |
| PSSC | Pacific States Steel Corporation |
| PSV | Pennsylvania Schuylkill Valley |
| PT | Port Townsend, Washington |
| PW | alau |
| PW | Palau |
| PWS | Prince William Sound |
| PZQ | Presque Isle County, Michigan |
| QDOS | Quasiparticle Density Of States |
| QMAP | Quality Mentoring Assessment Path |
| RC | Ramsey County |
| RCUS | Reformed Church in the United States |
| REACT | Radio Emergency Associated Communication Teams |
| RFCS | Royal Fire Connecting States |
| RI | hode Island |