PL, P.L., Pl, or .pl may refer to:

Businesses and organizations

Government and political

Partit Laburista The Labour Party (, PL), formerly known as the Malta Labour Party (, MLP), is the oldest List of political parties in Malta, political party in Malta, and one of the two major parties alongside the Nationalist Party (Malta), Nationalist Party. ...

, a Maltese political party *

Liberal Party (Brazil, 2006) The Liberal Party (, PL) is a far-right political party in Brazil. From its foundation in 2006 until 2019, it was called the Party of the Republic (, PR). The party was founded in 2006 as a merger of the 1985 Liberal Party and the Party of th ...

, a Brazilian political party *

Liberal Party (Moldova) Liberal Party (, PL) is a conservative-liberal political party in Moldova. The president of the party is the former Mayor of Chișinău, Dorin Chirtoacă. History The party was established under the name Party of Reform () in 1993 by Anatol � ...

, a Moldovan political party * Liberal Party (Rwanda), a Rwandan political party * Parlamentarische Linke, a parliamentary caucus in Germany *

Patriotic League (Bosnia and Herzegovina) The Patriotic League () was the first paramilitary unit of Territorial Defence Force of the Republic of Bosnia and Herzegovina (TORBiH). History On 19 December 1990 Alija Izetbegović and the SDA party discussed forming an independent paramili ...

(Bosnian: ''Patriotska Liga''), a military organisation of the Republic of Bosnia and Herzegovina *

Philippine Legislature The Philippine Legislature was the legislature of the Philippines from 1907 to 1935, during the American colonial period, and predecessor of the current Congress of the Philippines. It was bicameral and the legislative branch of the Insular ...

, a legislature that existed in the Philippines from 1907 to 1935 *

Progressive Labor Party (United States) The Progressive Labor Party (PLP) is an Anti-revisionism, anti-revisionist Marxism–Leninism, Marxist–Leninist communist party in the United States. It was established in January 1962 as the Progressive Labor Movement following a split in the ...

, a United States communist party

Sports leagues

* Palestine League, the top Palestinian football league *

Premier League The Premier League is a professional association football league in England and the highest level of the English football league system. Contested by 20 clubs, it operates on a system of promotion and relegation with the English Football Lea ...

, the top English football league *

Pacific League The , or , or the , due to sponsorship reasons, is one of the two professional baseball leagues constituting Nippon Professional Baseball in Japan. The winner of the league championship competes against the winner in the Central League for the a ...

, one of the two leagues in Japan's Nippon Professional Baseball * Pioneer Baseball League, a Rookie league in American Minor League Baseball *

Pioneer Football League The Pioneer Football League (PFL) is a collegiate List of NCAA conferences, athletic conference which operates in the United States. The conference participates in the National Collegiate Athletic Association, NCAA's NCAA Division I, Division I Fo ...

, NCAA FCS conference * Priaulx League, senior football league on the island of Guernsey

Other businesses and organizations

* Airstars Airways (IATA airline designator PL, 2000–2011) * Aeroperú (IATA airline designator PL, 1973–1999) * Papillion-La Vista Senior High School in Papillion, Nebraska, USA *

Public library A public library is a library, most often a lending library, that is accessible by the general public and is usually funded from public sources, such as taxes. It is operated by librarians and library paraprofessionals, who are also Civil servic ...

, a library maintained by government for public use * Professional Limited Liability Company, a limited liability company organized for the purpose of providing professional services

Places

* PL postcode area, UK, a group of postcode districts in England *

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

(ISO 3166-1 country code)

Religion

PL Kyodan , is a Japanese (new religious movement) founded in 1924 by Tokuharu Miki (:ja:御木徳一, 御木徳一; 1871–1938), who was a priest in the Ōbaku sect of Zen Buddhism. The stated aim of the Church of Perfect Liberty is to bring about world ...

, a religious movement founded in Japan in the early 20th century * ''

Patrologia Latina The ''Patrologia Latina'' (Latin for ''The Latin Patrology'') is an enormous collection of the writings of the Church Fathers and other ecclesiastical writers published by Jacques Paul Migne between 1841 and 1855, with indices published betwe ...

'', a collection of Catholic writings published by Jacques-Paul Migne between 1841 and 1855

Science, technology, and mathematics

Chemistry

Pyridoxal Pyridoxal (PL) is one form of vitamin B6. Some medically relevant bacteria, such as those in the genera '' Granulicatella'' and '' Abiotrophia'', require pyridoxal for growth. This nutritional requirement can lead to the culture phenomenon of s ...

, one form of vitamin B6 *

Pulchellidin Pulchellidin (Pl) is an ''O''-methylated anthocyanidin. It is a blue-red plant pigment. It can be found in '' Plumbago pulchella''. Glycosides * Pulchellidin 3-rhamnoside (molecular formula : C22H23O11, exact mass : 463.124036578) is reported in ...

(Pl), an anthocyanidin *

Phospholipid Phospholipids are a class of lipids whose molecule has a hydrophilic "head" containing a phosphate group and two hydrophobic "tails" derived from fatty acids, joined by an alcohol residue (usually a glycerol molecule). Marine phospholipids typ ...

, a class of lipids that are a major component of all cell membranes

Computing and telecommunications

File formats

* .pl, common filename suffix for

Perl Perl is a high-level, general-purpose, interpreted, dynamic programming language. Though Perl is not officially an acronym, there are various backronyms in use, including "Practical Extraction and Reporting Language". Perl was developed ...

scripts * .pl, common filename suffix for

Prolog Prolog is a logic programming language that has its origins in artificial intelligence, automated theorem proving, and computational linguistics. Prolog has its roots in first-order logic, a formal logic. Unlike many other programming language ...

programs * .pl, common filename suffix for TeX font property lists

Programming

Programming language A programming language is a system of notation for writing computer programs. Programming languages are described in terms of their Syntax (programming languages), syntax (form) and semantics (computer science), semantics (meaning), usually def ...

PL/C PL/C is an instructional dialect of the programming language PL/I, developed at the Department of Computer Science of Cornell University in the early 1970s in an effort headed by Professor Richard W. Conway and graduate student Thomas R. Wilcox. ...

, an instructional dialect of the PL/I computer programming language, developed at Cornell University in the 1970s **

PL/I PL/I (Programming Language One, pronounced and sometimes written PL/1) is a procedural, imperative computer programming language initially developed by IBM. It is designed for scientific, engineering, business and system programming. It has b ...

, a computer programming language developed in the 1960s **

PL/SQL PL/SQL (Procedural Language for SQL) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 6 - stored PL/SQL procedures/functions/packages/triggers sinc ...

, Oracle's procedural language extension (inception in 1995) ** PL/pgSQL, PostgreSQL's procedural language extension (inception 1998)

Telecommunication and networking

* .pl, country code top-level domain for Poland * PL tone, a kind of squelching of an audio signal *

Packet loss Packet loss occurs when one or more packets of data travelling across a computer network fail to reach their destination. Packet loss is either caused by errors in data transmission, typically across wireless networks, or network congestion.Ku ...

, one of the three main error types encountered in digital communications *

Path loss Path loss, or path attenuation, is the reduction in power density (attenuation) of an electromagnetic wave as it propagates through space. Path loss is a major component in the analysis and design of the link budget of a telecommunication system. ...

, in telecommunication engineering * Presentation layer, one of the seven layers in the OSI model of computer networking * Digital Private Line, another form of tone squelching

Mathematics

* Piecewise linear (disambiguation), in mathematics *

Propositional logic The propositional calculus is a branch of logic. It is also called propositional logic, statement logic, sentential calculus, sentential logic, or sometimes zeroth-order logic. Sometimes, it is called ''first-order'' propositional logic to contra ...

, a system of evaluating truth-based propositions in terms of binary logic * PL (complexity), in complexity theory

Other uses in science and technology

Ice pellets Ice pellets ( Commonwealth English) or sleet (American English) is a form of precipitation consisting of small, hard, translucent balls of ice. Ice pellets are different from graupel ("soft hail"), which is made of frosty white opaque rime, a ...

(METAR weather code PL), a form of precipitation * Picolitre (pL), and petaliter (PL), units of volume *

Pluto Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of Trans-Neptunian object, bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Su ...

, a dwarf planet *

Photoluminescence Photoluminescence (abbreviated as PL) is light emission from any form of matter after the absorption of photons (electromagnetic radiation). It is one of many forms of luminescence (light emission) and is initiated by photoexcitation (i.e. phot ...

, the re-emission of photons from a surface following exposure *

Pierre Levasseur (aircraft builder) Pierre Georges Albert Levasseur (July 16, 1890 in Paris – August 2, 1941 in Paris) was a French aircraft and component maker. He set up his company ''Société Pierre Levasseur Aéronautique'', always referred to simply as Levasseur in Paris in 1 ...

, a French aircraft designer * Plastic limit, in geotechnical engineering * PL / Positive Lock, a

lens mount A lens mount is an interface – mechanical and often also electrical – between a photographic camera body and a lens. It is a feature of camera systems where the System camera, body allows interchangeable lenses, most usually the rangefinder ...

used on Arri cameras and lenses * pl., abbreviation for

printing plate Printing is a process for mass reproducing text and images using a master form or template. The earliest non-paper products involving printing include cylinder seals and objects such as the Cyrus Cylinder and the Cylinders of Nabonidus. The ...

s, often indicating the number of plate-based illustrations in a book * Adobe Prelude, an Adobe software

Other uses

Platoon leader A platoon leader (NATO) or platoon commander (more common in Commonwealth militaries and the US Marine Corps) is the officer in charge of a platoon. This person is usually a junior officer – a second or first lieutenant or an equivalent rank ...

, in the US Army *

Plural In many languages, a plural (sometimes list of glossing abbreviations, abbreviated as pl., pl, , or ), is one of the values of the grammatical number, grammatical category of number. The plural of a noun typically denotes a quantity greater than ...

, in grammar *

Polish language Polish (, , or simply , ) is a West Slavic languages, West Slavic language of the Lechitic languages, Lechitic subgroup, within the Indo-European languages, Indo-European language family, and is written in the Latin script. It is primarily spo ...

(ISO 639-1 code "pl") * ''

Political Liberalism Liberalism is a political and moral philosophy based on the rights of the individual, liberty, consent of the governed, political equality, the right to private property, and equality before the law. Liberals espouse various and often mut ...

'', a 1993 book by the American philosopher John Rawls *

Private label A private label, also called a private brand or private-label brand, is a brand owned by a company, offered by that company alongside and competing with brands from other businesses. A private-label brand is almost always offered exclusively by th ...

, an arrangement between companies regarding the exclusive sale of goods *

Public law Public law is the part of law that governs relations and affairs between legal persons and a government, between different institutions within a state, between different branches of governments, as well as relationships between persons that ...

Public liability Public liability is part of the law of tort which focuses on civil wrongs. An applicant (the injured party) usually sues the respondent (the owner or occupier) under common law based on negligence and/or damages. Claims are usually successful when ...

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