PNP
- 4-Nitrophenol
- Islamabad
- Legacy Plug and Play
- Naoko Takeuchi
- National Popular Party (Romania)
- New Progressive Party (Puerto Rico)
- P versus NP problem
- PNP transistor
- Parti national populaire
- Partido Nashonal di Pueblo
- Party and play
- People's New Party
- Peoples National Party (disambiguation)
- Perspective-n-Point
- Peruvian National Police
- Peruvian Nationalist Party
- Philippine National Police
- Pick-and-place machine
- Pindus National Park
- Plug and play
- Princeton Newport Partners
- Progressive National Party (disambiguation)
- Provincial Nomination Program
- Purine nucleoside phosphorylase
- Universal Plug and Play
- Vitamin B6