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

Businesses and organizations

Government and political

Partit Laburista The Labour Party ( mt, Partit Laburista, PL), formerly known as the Malta Labour Party ( mt, Partit tal-Ħaddiema, MLP), is one of the two major political parties in Malta, along with the Nationalist Party. It sits on the centre-left of the po ...

, a Maltese political party *

Liberal Party (Brazil, 2006) The Liberal Party ( pt, Partido Liberal, PL) is a conservative and national liberal political party in Brazil. From its foundation in 2006 until 2019, it was called the Party of the Republic ( pt, Partido da República, PR). The party was found ...

, a Brazilian political party *

Liberal Party (Moldova) Liberal Party ( ro, Partidul Liberal, 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 ( ...

, a Moldovan political party *

Liberal Party (Rwanda) The Liberal Party (french: Parti Libéral, PL) is a liberal political party in Rwanda led by Prosper Higiro. History The party was established in 1991.Aimable Twagilimana (2015) ''Historical Dictionary of Rwanda'', Rowman & Littlefield, p180 A ...

, a Rwandan political party * Parlamentarische Linke, a parliamentary caucus in Germany *

Patriotic League (Bosnia and Herzegovina) The Patriotic League ( sh, Patriotska Liga) 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 ...

(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 G ...

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

Progressive Labor Party (United States) The Progressive Labor Party (PLP) is an anti-revisionist Marxist–Leninist communist party in the United States. It was established in January 1962 as the Progressive Labor Movement following a split in the Communist Party USA, adopting its ne ...

, a United States communist party

Sports leagues

Premier League The Premier League (legal name: The Football Association Premier League Limited) is the highest level of the men's English football league system. Contested by 20 clubs, it operates on a system of promotion and relegation with the English Fo ...

, the top English association football league *

Pacific League The or 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 annual Japan Series. It currently cons ...

, one of the two leagues in Japan's Nippon Professional Baseball *

Pioneer Baseball League The Pioneer League is an independent baseball league that operates in the Rocky Mountain region of the United States. Its teams are not directly affiliated with Major League Baseball (MLB). It is designated as an MLB Partner League. From 1939 t ...

, a Rookie league in Minor League Baseball *

Pioneer Football League The Pioneer Football League (PFL) is a collegiate athletic conference which operates in the United States. The conference participates in the NCAA's Division I Football Championship Subdivision (FCS) as a football-only conference. It has member ...

, NCAA FCS conference

Other businesses and organizations

* Airstars Airways (IATA airline designator PL, 2000–2011) *

Aeroperú Empresa de Transporte Aéreo del Perú S.A., branded as Aeroperú, was a Peruvian airline, serving as flag carrier of Peru from 1973 to 1999. The company was headquartered in Lima, with the city's Jorge Chávez International Airport serving as i ...

(IATA airline designator PL, 1973–1999) *

Papillion-La Vista Senior High School Papillion-La Vista Senior High School, often referred to as Papio, PLHS, North or "Old School", is located in Papillion, Nebraska, United States and is operated by the Papillion-La Vista Public School District. Its school colors are maroon and g ...

in Papillion, Nebraska, USA * Public library, a library maintained by government for public use *

Professional Limited Liability Company A limited liability company (LLC for short) is the US-specific form of a private limited company. It is a business structure that can combine the pass-through taxation of a partnership or sole proprietorship with the limited liability of ...

, a limited liability company organized for the purpose of providing professional services

Places

PL postcode area The PL postcode area, also known as the Plymouth postcode area, is a group of 35 postcode districts in South West England, within 25 post towns. These cover west Devon (including Plymouth, Tavistock, Ivybridge, Yelverton and Lifton) and east ...

, UK, a group of postcode districts in England *

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populou ...

(ISO 3166-1 country code)

Religion

* PL Kyodan, a religious movement founded in Japan in the early 20th century * '' Patrologia Latina'', a collection of Catholic writings published by Jacques-Paul Migne between 1841 and 1855

Science, technology, and mathematics

Chemistry

Pyridoxal Pyridoxal 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 satellit ...

, 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, 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 family of two high-level, general-purpose, interpreted, dynamic programming languages. "Perl" refers to Perl 5, but from 2000 to 2019 it also referred to its redesigned "sister language", Perl 6, before the latter's name was offic ...

scripts * .pl, common filename suffix for

Prolog Prolog is a logic programming language associated with artificial intelligence and computational linguistics. Prolog has its roots in first-order logic, a formal logic, and unlike many other programming languages, Prolog is intended primarily ...

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. Most programming languages are text-based formal languages, but they may also be graphical. They are a kind of computer language. The description of a programming ...

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 developed and published by IBM. It is designed for scientific, engineering, business and system programming. I ...

, 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 since ...

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

Telecommunication and networking

.pl 


 is the Internet country code top-level domain (ccTLD) for Poland, administered by  NASK, the Polish research and development organization. It is one of the founding members of  CENTR.
  History 
The  domain was created in 1990, following the mit ...

, 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.Kur ...

, 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 In the seven-layer OSI model of computer networking, the presentation layer is layer 6 and serves as the data translator for the network. It is sometimes called the syntax layer. Description Within the service layering semantics of the OSI netw ...

, one of the seven layers in the OSI model of computer networking *

Digital Private Line In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a strong input signal. Essentially, squelch is a specialized type of noise gate designed to suppress weak s ...

, another form of tone squelching

Mathematics

* Piecewise linear (disambiguation), in mathematics *

Propositional logic Propositional calculus is a branch of logic. It is also called propositional logic, statement logic, sentential calculus, sentential logic, or sometimes zeroth-order logic. It deals with propositions (which can be true or false) and relations b ...

, a system of evaluating truth-based propositions in terms of binary logic *

PL (complexity) PL, or probabilistic L, is the class of languages recognizable by a polynomial time logarithmic space randomized machine with probability > (this is called unbounded error). Equivalently, as shown below, PL is the class of languages recogniz ...

, in complexity theory

Other uses in science and technology

* Ice pellets (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 bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest ...

, a dwarf planet * Photoluminescence, the re-emission of photons from a surface following exposure * Pierre Levasseur (aircraft builder), a French aircraft designer *

Plastic limit The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil: its shrinkage limit, plastic limit, and liquid limit. Depending on its water content, soil may appear in one of four states: solid, semi-solid, plastic ...

, in geotechnical engineering

Other uses

Platoon leader {{unreferenced, date=February 2013 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 ...

, in the US Army *

Plural The plural (sometimes abbreviated pl., pl, or ), in many languages, is one of the values of the grammatical category of number. The plural of a noun typically denotes a quantity greater than the default quantity represented by that noun. This de ...

, in grammar *

Polish language Polish (Polish: ''język polski'', , ''polszczyzna'' or simply ''polski'', ) is a West Slavic language of the Lechitic group written in the Latin script. It is spoken primarily in Poland and serves as the native language of the Poles. In a ...

(ISO 639-1 code "pl") *

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 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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