PF

PF may refer to:

Arts and entertainment

 * Pianoforte, full original name of the piano instrument
 * Phineas Flynn, a fictional character
 * Project Fanboy, a comic book news website
 * Peregrine Falcons Squad, a faction in the Metal Slug series of video games

Businesses

 * PF Flyers, a brand of shoes
 * Palestinian Airlines (IATA code PF 1995-2020), a Palestinian airline that operated from Egypt
 * Primera Air (IATA code PF 2009-2018), a Danish airline
 * Pell Frischmann, a multi-disciplinary engineering consultancy

Economics and finance

 * Pfennig, a unit of currency formerly used in Germany, symbol ₰
 * Provident Fund (disambiguation), name of various pension funds

Language

 * Phonetic form, a level of syntactic representation in linguistics
 * Voiceless labiodental affricate (⟨p̪͡f⟩, ⟨p̪͜f⟩, or ⟨p̪f⟩), a type of consonant sound
 * Pf (digraph), a German digraph

Organizations

 * Pheasants Forever, a non-profit habitat conservation organization
 * Federal Police (Polícia Federal), in Brazil
 * Patients' Front, a late 1960s to early 1970s West German pro-illness movement
 * South Vietnamese Popular Force, a local defense militia formed by South Vietnam during the Vietnam War
 * Patriotic Front (disambiguation), name of a political party in several countries

Places

 * Paracel Islands, FIPS PUB 10-4 territory code
 * French Polynesia (Polynésie française), by ISO 3166 code
 * .pf, internet country code for French Polynesia
 * Pforzheim and Enzkreis district, Germany (vehicle plate code PF)

Computing

 * .pf, internet country code for French Polynesia
 * PF (firewall), OpenBSD's stateful packet filter
 * PF keys, a type of function keys on old keyboards
 * Page fault, a type of exception (error) in computer programming
 * Page file, a file used as an extension for computer memory

Physics

 * Power factor, or cos phi, of an AC electric power system
 * Purple fringing, a type of chromatic aberration in photography
 * Phenol formaldehyde resin, the earliest synthetic polymer
 * Picofarad (pF) or petafarad (PF), multiples of farad, the SI unit of electric capacitance
 * Photon Factory, a synchrotron located at KEK in Tsukuba, Japan

In other sciences and mathematics

 * pf(A), the Pfaffian of a matrix A
 * Phenylphosphine, an organophosphorus compound
 * Plasmodium falciparum, a species of Plasmodium that causes malaria in humans
 * Polar front, in meteorology
 * Position fix, a position derived from measuring external reference points
 * Psychometric function, an inferential psychometric model
 * Horowitz index (PF), blood oxygenation

Sports

 * Personal foul (disambiguation), a type of foul in several sports
 * Power forward (disambiguation), a type of position in several sports

Other uses

 * A US Navy hull classification symbol: Patrol frigate (PF)
 * Pilot flying, in commercial aviation, a designation for the pilot in control of an aircraft
 * Pour féliciter, text on New Year card
 * Procurator fiscal, the public prosecutor in Scotland
 * Public forum debate, a debate sanctioned by the National Forensic League
 * Pekoe Fannings, a grade of tea leaves