PL
- .pl
- Adobe Prelude
- Aeroperú
- Airstars Airways
- Digital Private Line
- Ice pellets
- Liberal Party (Brazil, 2006)
- Liberal Party (Moldova)
- Liberal Party (Rwanda)
- Litre
- PL (complexity)
- PL Kyodan
- PL postcode area
- PL tone
- PL/C
- PL/I
- PL/SQL
- PL/pgSQL
- Pacific League
- Packet loss
- Palestine League
- Papillion-La Vista Senior High School
- Parlamentarische Linke
- Partit Laburista
- Path loss
- Patriotic League (Bosnia and Herzegovina)
- Patrologia Latina
- Perl
- Philippine Legislature
- Phospholipid
- Photoluminescence
- Piecewise linear (disambiguation)
- Pierre Levasseur (aircraft builder)
- Pioneer Baseball League
- Pioneer Football League
- Plastic limit
- Platoon leader
- Plural
- Pluto
- Poland
- Polish language
- Political Liberalism
- Premier League
- Presentation layer
- Priaulx League
- Private label
- Professional Limited Liability Company
- Programming language
- Progressive Labor Party (United States)
- Prolog
- Propositional logic
- Public law
- Public liability
- Public library
- Pulchellidin
- Pyridoxal
- TeX font metric