PL, P.L., Pl, or .pl may refer to:
Businesses and organizations
Government and political
- Partit Laburista, a Maltese political party
- Liberal Party (Brazil, 2006), a Brazilian political party
- Liberal Party (Moldova), a Moldovan political party
- Liberal Party (Rwanda), a Rwandan political party
- Parlamentarische Linke, a parliamentary caucus in Germany
- Patriotic League (Bosnia and Herzegovina) (Bosnian: Patriotska Liga), a military organisation of the Republic of Bosnia and Herzegovina
- Philippine Legislature, a legislature that existed in the Philippines from 1907 to 1935
- Progressive Labor Party (United States), a United States communist party
Sports leagues
- Premier League, the top English football league
- Pacific League, 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, NCAA FCS conference
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 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 (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, one form of vitamin B6
- Pulchellidin (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 scripts.pl, common filename suffix for Prolog programs.pl, common filename suffix for TeX font property lists
Programming
- Programming language
- PL/C, an instructional dialect of the PL/I computer programming language, developed at Cornell University in the 1970s
- PL/I, a computer programming language developed in the 1960s
- PL/SQL, 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, one of the three main error types encountered in digital communications
- Path loss, 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, 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 (METAR weather code PL), a form of precipitation
- Picolitre (pL), and petaliter (PL), units of volume
- Pluto, a dwarf planet
- Photoluminescence, the re-emission of photons from a surface following exposure
- Pierre Levasseur (aircraft builder), a French aircraft designer
- Plastic limit, in geotechnical engineering
- pl., abbreviation for printing plates, often indicating the number of plate-based illustrations in a book
- Adobe Prelude, an Adobe software
Other uses
- Platoon leader, in the US Army
- Plural, in grammar
- Polish language (ISO 639-1 code "pl")
- Private label, an arrangement between companies regarding the exclusive sale of goods
- Public law
- Public liability
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