Encyclopedias, Almanacs, Transcripts, and Maps
- Psellus, Michael
- Pseudo Babblers (Pomatostomidae)
- pseudomorphism
- Psittaciformes (Parrots)
- Psocoptera (Book Lice)
- Psychedelic Drugs
- Psychology
- Psychology: Psychology of Religion
- Psychology: Psychotherapy and Religion
- Psychology: Schizoanalysis and Religion
- psychosomatic disorder
- pteridophyte
- Pterocliformes (Sandgrouse)
- Pu Yi, Henry
- Public Health Service
- Public Interest Group
- Public Lands Council
- public limited company
- public sector borrowing requirement
- Public Trust