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 / Positive Lock, a
lens mount used on Arri cameras and lenses • pl., abbreviation for
printing plates, often indicating the number of plate-based illustrations in a book •
Adobe Prelude, an Adobe software ==Other uses==