| Abbreviation | Definition |
|---|---|
| P.S.P. | President’s Surveillance Program (signed arguably into law by G.W. Bush on 2001-10-04) |
| P.S.P. | Presidents Surveillance Program (signed arguably into law by G.W. Bush on 2001-10-04) |
| P4P | Pay-for-performance |
| PA | Palestinian Authority |
| PA | Past Action |
| PA | People Authority |
| PA | Personal Assassin |
| PA | Post Apocalyptic |
| PA | President Assassination |
| PA | Privacy Act |
| PA | Process the Acronym |
| PA | Public Address |
| PA | Public Announcement |
| PAA | Potential Annexation Area |
| PAB | Policy Advisory Board |
| PAC | Politically Active Constituency |
| PAC | Public Affairs Committee |
| PACA | Perishable Agricultural Commodities Act |
| PACE | Program of All-Inclusive Care for the Elderly |
| PACTACLET | Pacific Tactical Law Enforcement Team |