| Abbreviation | Definition |
|---|---|
| POR | Producer Of Record |
| POR | Public Opinion Research |
| PORE | POrt REyes National Seashore |
| POREP | POsition REPort |
| PORM | Policy on Research Misconduct |
| POSSLQ | Persons Of Opposite Sex Sharing Living Quarters |
| POST | Physician Orders for Scope of Treatment |
| POST | Postal Station |
| POTW | Public Operator of Treatment Works |
| POW | prince of war |
| POW/MP | Prisoner of War/Missing Personnel |
| POWER | Promoting Outstanding Work Ethics And Responsibility |
| POWRE | Professional Opportunities for Women in Research and Education (NSF) |
| PP | Parliarmentary Procedure |
| PP | PassPort |
| PP | Pilot Project |
| PP | Policy Procedure |
| PP | Postage Paid |
| PPA | Participatory Poverty Assessment |
| PPA | Presidential Power Abused |