| Abbreviation | Definition |
|---|---|
| PRY | Primary |
| PS | Police Sergeant |
| PS | Professional Services |
| PSA | Public Service Announcement |
| PSC | Papanicolaou Society of Cytopathology |
| PSC | Program Support Center |
| PSC | Public Service Commission |
| PSD | Private Sector Development |
| PSE | Public Service Equipment |
| PSF | Political Survival Fund |
| PSG | Presidential Security Guard |
| PSHR | Public Service Honor Roll |
| PSI | Pollution Standard Index |
| PSI | Private Sector Involvement |
| PSI | Public Subject Identifier |
| PSIP | Program for Strategic Industrial Projects |
| PSO | Provide Stamps Only |
| PSO | Public Suppport Operation |
| PSO | Purchasing And Supply Online |
| PSOPPC | Patient Safety Organization Privacy Protection Center |