PN may refer to:
Arts and entertainment
* ''
Purple Noon'', a 1960 film
*
Patriotic Nigras
The Patriotic Nigras (also known by the initialism PN) were a group of griefers in the online world of ''Second Life''.
While the PN were known mainly for the disruption of ''Second Life'' and its users, they had also established themselves on the ...
, a griefing group in the game ''Second Life''
Business and economics
*
Pacific National, a rail freight company in Australia
*
Participatory notes
A participatory note, commonly known as a P-note or PN, is an instrument issued by a registered foreign institutional investor (FII) to an overseas investor who wishes to invest in Indian stock markets without registering themselves with the mar ...
, issued to unregistered overseas investors in Indian stock markets
*
Pennsylvania Northeastern Railroad (reporting mark PN)
*
Promissory note
A promissory note, sometimes referred to as a note payable, is a legal instrument (more particularly, a financing instrument and a debt instrument), in which one party (the ''maker'' or ''issuer'') promises in writing to pay a determinate sum of ...
, 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
ur, ہمارے لیے اللّٰہ کافی ہے اور وہ بہترین کارساز ہے۔ English language, English: Allah is Sufficient for us - and what an excellent (reliable) Trustee (of affairs) is He!(''Quran, Qur'an, Al Imran, 3:173' ...
*
Peruvian Navy
The Peruvian Navy ( es, link=no, Marina de Guerra del Perú, abbreviated MGP) is the branch of the Peruvian Armed Forces tasked with surveillance, patrol and defense on lakes, rivers and the Pacific Ocean up to from the Peruvian littoral. Addit ...
*
Philippine Navy
The Philippine Navy (PN) ( tgl, Hukbong Dagat ng Pilipinas, , Sea Army of the Philippines) ( es, Armada de Filipinas, , Ejército del Mar de las Filipinas) is the naval warfare service branch of the Armed Forces of the Philippines. It has an e ...
*
Portuguese Navy
Political parties
*
National Renaissance Front
The National Renaissance Front ( ro, Frontul Renașterii Naționale, FRN; also translated as ''Front of National Regeneration'', ''Front of National Rebirth'', ''Front of National Resurrection'', or ''Front of National Renaissance'') was a Romani ...
, Partidul Naţiunii, a political party in Romania
*
Partit Nazzjonalista, a political party in Malta
*
Perikatan Nasional, a political coalition in Malaysia
*
Partido Nacional (Uruguay), a political party in Uruguay
Places
*
Penang
Penang ( ms, Pulau Pinang, is a Malaysian state located on the northwest coast of Peninsular Malaysia, by the Malacca Strait. It has two parts: Penang Island, where the capital city, George Town, is located, and Seberang Perai on the Malay ...
*
Pitcairn Islands
The Pitcairn Islands (; Pitkern: '), officially the Pitcairn, Henderson, Ducie and Oeno Islands, is a group of four volcanic islands in the southern Pacific Ocean that form the sole British Overseas Territory in the Pacific Ocean. The four isl ...
(ISO 3166-1 country code)
*
Palmerston North, a city in New Zealand
*
Province of Pordenone
The province of Pordenone ( it, provincia di Pordenone; ; vec, provincia de Pordenon) was a province in the autonomous region of Friuli-Venezia Giulia in Italy. Its capital was the city of Pordenone. The province was subdivided from the province ...
, a
province in the autonomous region of
Friuli Venezia Giulia in
Italy
Science, technology, and mathematics
Biology
*
Parenteral nutrition
*
Phylogenetic nomenclature
Phylogenetic nomenclature is a method of nomenclature for taxa in biology that uses phylogenetic definitions for taxon names as explained below. This contrasts with the traditional approach, in which taxon names are defined by a '' type'', which ...
, an approach to naming groups of living things
Electronics and computing
*
.pn, the country code top level domain (ccTLD) for Pitcairn Islands
*
p–n junction
A p–n junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor. The "p" (positive) side contains an excess of holes, while the "n" (negative) side contains ...
, 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
The particle number (or number of particles) of a thermodynamic system, conventionally indicated with the letter ''N'', is the number of constituent particles in that system. The particle number is a fundamental parameter in thermodynamics which is ...
, in air-quality measurement
*
petanewton
The newton (symbol: N) is the unit of force in the International System of Units (SI). It is defined as 1 kg⋅m/s, the force which gives a mass of 1 kilogram an acceleration of 1 metre per second per second. It is named after Isaac Newton in ...
, a
quadrillion newtons
The newton (symbol: N) is the unit of force in the International System of Units (SI). It is defined as 1 kg⋅m/s, the force which gives a mass of 1 kilogram an acceleration of 1 metre per second per second. It is named after Isaac Newton in r ...
*
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
*
Phosphorus mononitride
Phosphorus mononitride is an inorganic compound with the chemical formula P N. Containing only phosphorus and nitrogen, this material is classified as a binary nitride.
It is the first identified phosphorus compound in the interstellar medium.
...
(PN), an inorganic compound found in space
Other uses
* Pottery
Neolithic
*
Proper noun, a linguistic term for the name of an entity
* ''
Public News'', an alternative newspaper in Houston (1982-1998)
{{disambiguation