| Meaning | Category |
| PPP (Point-to-Point Protocol) Over Ethernet | Computing->Networking |
| Parallel Operating Environment | Computing->Networking |
| Pediatric Oncology Education | Medical->Oncology |
| People Of Earth | Miscellaneous->Unfiled |
| Peter's Operating Environment | Computing->General |
| Peters Operating Environment | Computing->Software |
| Phylogeny Ontogeny And Epigenesis | Medical->Physiology |
| Phylogeny Ontogeny Epigenesis | Miscellaneous->Unfiled |
| Pieces Of Eight | Regional->Currencies |
| Pilot Operational Equipment | Governmental->NASA |
| Place Of Employment | Business->General Miscellaneous->Unfiled |
| Point Of Elimination | Governmental->Military Community->Sports |
| Point Of Origin Energetics | Governmental->Military |
| Point of Entry | Governmental->Police Governmental->US Government |
| Port Of Embarkation | Governmental->Military |
| Port Of Entry | Governmental->US Government |
| Port of Embarkment | Governmental->Transportation |
| Portal Of Evil | Internet |
| Post Occupancy Evaluation | Miscellaneous->Unfiled |
| Power Over Ethernet | Miscellaneous->Unfiled |
| Power Over Internet | Computing->Networking |
| Predict Observe Explain | Business->General |
| Preparation Of Estimate | Business->General |
| Prince Of Egypt | Business->Positions |
| Problem Of Evil | Miscellaneous->Unfiled |
| Process Of Elimination | Community->Law |
| Program Of Emphasis | Academic & Science->Universities |
| Program Outcome Evaluation | Miscellaneous->Unfiled |
| Purity Of Essence | Miscellaneous->Unfiled |
| The Perl Object Environment | Miscellaneous->Unfiled |
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