| Abbreviation | Definition |
|---|---|
| PROVE | Political Relevant Opportune Verified and Expedited |
| PRP | Peoples Redemption Party |
| PRP | Praja Rajyam Party |
| PRPM | Partido Revolucionario Popular Mongol |
| PRS | Partido Regional del Sur |
| PRS | Poverty Reduction Strategies |
| PRSD | Parti radical social démocrate |
| PRSD | Partido Radical Social Democrata |
| PRSS | Political Risk Sovereign Spread |
| PRU | Partnership for Reform in Ukraine |
| PRW | Presumpscot River Watch |
| PS | Parti Socialiste |
| PSA | Partido Socialista de Andalucía |
| PSA | Partido Socialista de Aragón |
| PSA | Partnership for a Secure America |
| PSBSR | Politics and Society in the Baltic Sea Region |
| PSCL | Political Science Computational Laboratory |
| PSD | Paducah Sun Democrat |
| PSD | Partidul Social Democrat |
| PSDB | Partido da Social Democracia Brasileira |