- Arts and entertainment
- Business and economics
- Organizations Navies Political parties
- Places
- Science, technology, and mathematics Biology Electronics and computing Mathematics Other uses in science and technology
- Other uses
PN may refer to:
{{tocright}}Arts and entertainment
- Purple Noon, a 1960 film
- Patriotic Nigras, a griefing group in the game Second Life
Business and economics
- Pacific National, a rail freight company in Australia
- Participatory notes, issued to unregistered overseas investors in Indian stock markets
- Pennsylvania Northeastern Railroad (reporting mark PN)
- Promissory note, a contract where one party makes an unconditional promise in writing to pay a sum of money to another
- West Air (China) (IATA airline code PN)
Organizations
Navies
- Pakistan Navy
- Peruvian Navy
- Philippine Navy
- Portuguese Navy
Political parties
- National Renaissance Front, Partidul Naţiunii, a political party in Romania
- Partit Nazzjonalista, a political party in Malta
Places
- Pitcairn Islands (ISO 3166-1 country code)
- Palmerston North, a city in New Zealand
Science, technology, and mathematics
Biology
- Parenteral nutrition
- Phylogenetic nomenclature, an approach to naming groups of living thingsfhiml
Electronics and computing
- .pn, the country code top level domain (ccTLD) for Pitcairn Islands
- p-n junction, a type of junction in electronics
Mathematics
- Path graph of size
, denoted by 
- Petri net, one of several mathematical modeling languages for the description of distributed systems
- Polish notation, a prefix notation proposed by Jan Łukasiewicz
- Polynomial vector spaces, denoted by
- Pseudorandom number sequence
Other uses in science and technology
- Part number, an identifier of a particular part design used in a particular industry
- Particle number, in air-quality measurement
- Planetary nebula, in astronomy
- Post-Newtonian expansion, an approximation of General Relativity
- Proportional navigation, a concept in missile guidance systems
- Pseudorandom noise, a deterministic sequence of pulses used in spread spectrum communication and rangefinding
Other uses
- Pottery Neolithic
- Proper noun, a linguistic term for the name of an entity
- Public News, an alternative newspaper in Houston (1982-1998)
- JW-105
- JW3
- J. W. Abert
- J.W. Abert
- J. Waites Waring
- Jwaiya
- JWAL
- Jwala (1971 film)
- Jwala Gutta
- JWALA Gutta
- Jwala Gutta (badminton)
- Jwala Ji
- Jwalamalini
- Jwalamukhi (2000 film)
- Jwalamukhi (poet)
- Jwalamukhi temple
- Jwala P. Gutta
- Jwalapuram
- J. Waldenstroem
- J. Waldo Ackerman
- J Wales
- J. W. Alexander (disambiguation)
- JWalk
- J-Walk (disambiguation)
- J-Walk (Korean band)