Encyclopedias, Almanacs, Transcripts, and Maps
- Prune-Belly Syndrome
- Prune-belly syndrome
- Prusiner, Stanley (1942- )
- Pryse, James Morgan, Jr. (1859-1942)
- Pseudo Babblers: Pomatostomidae
- Pseudo-Dionysius the Areopagite
- Pseudoachondroplasia
- Pseudobulbar Palsy
- Pseudoscience
- Pseudoscience and Forensics
- Pseudotumor Cerebri
- Psi Magazine
- Psi Network
- Psi News
- Psi Patterns (Journal)
- Psi Research (Journal)
- Psi Science Institute of Japan
- Psi-Conducive
- Psi-Forum (Journal)
- Psi-Hitting