PL

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

Businesses and organizations

Government and political

• Partido Laborista
• Partit Laburista, a Maltese political party
• Patriotic League (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, a United States communist party

Sports leagues

• Pioneer Baseball League, a Rookie league in Minor League Baseball
• Pioneer Football League, NCAA FCS conference
• Premier League, the top English football league
• Pacific League, one of the two leagues in Japan's Nippon Professional Baseball

Other businesses and organizations

• Airstars Airways (IATA airline designator PL)
• AeroPeru (IATA airline designator PL)
• Papillion-La Vista Senior High School in Papillion, Nebraska, USA
• Public library, a library maintained by government for public use

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

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

• Procedural programming, a programming paradigm
• Programming language
  • PL/C, a computer programming language developed in the 1970s
  • PL/I, a computer programming language developed in the 1960s
  • PL/SQL, Oracle's procedural language extension

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, in mathematics
• Propositional logic, a system of evaluating truth-based propositions in terms of binary logic

Other uses in science and technology

• Ice pellets (METAR weather code PL)
• Picolitre (pL) and petaliter (PL), units of volume
• Pluto, a dwarf planet discovered by Percival Lowell
• Photoluminescence, the re-emission of photons from a surface following exposure
• Pierre Levasseur, a French aircraft designer
• Plastic limit, in geotechnical engineering

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