PL may stand for:

In politics, law and philosophy:

• Patrologia Latina
• PL Kyodan, a religious movement founded in Japan in the early 20th Century
• Poland:
  • Polish language
• Progressive Labor Party, a United States communist party
• Propositional logic, a system of evaluating truth-based propositions in terms of binary logic
• Public library
• Public law
• Public liability

In science, aviation and military:

• Airstars Airways, IATA airline designators (PL)
• AeroPeru, IATA airline designators (PL)
• Patriotic League (Bosnian: Patriotska Liga), a first military organisation of Republic of Bosnia and Herzegovina
• Photoluminescence
• Plastic limit in geotechnical engineering
• Ice Pellets, METAR Code PL
• PL tone
• Piecewise linear
• Digital Private Line
• Two variants of Litre, picolitre (pL) and petaliter (PL)

In computing and internet:

• .pl, country code top-level domain for Poland
• .pl, common filename suffix for Perl scripts
• .pl, common filename suffix for Prolog programs
• .pl, common filename suffix for TeX font property lists
• PL/C
• PL/I
• PL/SQL
• Packet loss
• Procedural programming
• Programming language

In sports:

• Pioneer Baseball League, a Rookie league in Minor League Baseball
• Pioneer Football League, NCAA FCS conference
• Premier League, the top English football league

cs:PL de:PL el:PL es:PL eo:Pl fr:PL ko:PL it:PL ja:PL no:Pl pt:PL ksh:PL (Watt ?ßß datt?) sl:PL fi:Pl sv:PL