Encyclopedias, Almanacs, Transcripts, and Maps
- ping pong
- Pioneer program
- Pipe Snakes (Cylindrophiidae)
- Pipits and Wagtails (Motacillidae)
- Pittas (Pittidae)
- Piłsudski, Józef
- Placer Mining
- Placozoa (Placozoans)
- plaice
- Plantcutters (Phytotomidae)
- Plecoptera (Stoneflies)
- Pleuronectiformes (Flatfishes)
- Plovers and Lapwings (Charadriidae)
- Plow Pan
- Pocket Gophers (Geomyidae)
- Pocket Mice, Kangaroo Rats, and Kangaroo Mice (Heteromyidae)
- Podicipediformes (Grebes)
- Poetry: Chinese Religious Poetry
- Poetry: Indian Religious Poetry
- Poetry: Islamic Poetry