PK or pk may refer to:
Arts and entertainment
Gaming
- Probability of kill (Pk), in computer games, simulations, models, and operations research
 - Disney's PK: Out of the Shadows, a 2002 video game
 - Player killing, player versus player conflict in MMORPGs and MUDs
 
Other media
- PK (film), a 2014 Indian film directed by Rajkumar Hirani and starring Aamir Khan
 - Paperinik, a cartoon character
 - Peacekeepers (Farscape), in the Farscape television show
 
Organisations
- Pakistan International Airlines (IATA airline code)
 - Polyteknikkojen Kuoro, a Finnish academic male choir
 - Promise Keepers, a Christian men's organization
 - Swedish Publicists' Association (Swedish: Publicistklubben), Swedish journalist organization
 
People
- P.K (producer), of the South Korean music production duo Future Bounce
 - P. K. van der Byl (1923–1999), Rhodesian politician
 - P. K. Subban (born 1989), hockey player
 - Paul Kalkbrenner (born 1977), electronic musician
 - Phil Katz (1962–2000), creator of the PKZIP file compression software
 - Philip K. Wrigley (1894–1977), American chewing gum manufacturer
 - Paul Kagame (born 1957), President of Rwanda
 - Patricia Karvelas, Australian radio presenter, current affairs journalist and political correspondent
 
Places
- PK, or Busan–Gyeongnam Area, a metropolitan area in South Korea
 - Pakistan (ISO country code)
 - Possum Kingdom Lake, Texas, US
 - Pickering, Ontario, Canada
 - Peking, old name of Beijing
 
Science and technology
Chemistry and pharmacology
- pK, negative logarithm of the dissociation constant K (-logK)
 - Pharmacokinetics, a branch of pharmacology dedicated to determining the fate of substances administered to a living organism
 
Computing
- PK, a magic number commonly used in the Zip file format
 - .pk, the country code top level domain (ccTLD) for Pakistan
 - Port knocking, a method of externally opening ports on a firewall
 - Public-key cryptography
 
Other uses in science and technology
- PK machine gun, a Soviet weapon, abbreviated from Pulemyot Kalashnikova (Kalashnikov machine gun)
 - Horsepower (Dutch abbreviation paardenkracht)
 - Pentax K-mount, a camera lens mount
 - Catalogue of galactic planetary nebulae (Perek-Kohoutek), in astronomy
 - Renault PK, a car made by Pars Khodro between 2000 and 2005
 - PK screws, self-tapping screws (Parker-Kalon) for sheet metal
 
Sports
- Parkour, the activity or sport of moving rapidly through an area, typically urban, negotiating obstacles by running, jumping, and climbing
 - Penalty kick (association football)
 - Penalty kill, in ice hockey
 - Placekicker, in American football
 
Other uses
- Point kilométrique (English: Kilometric point), a measurement of distance travelled
 - Preacher's kid, a child of a pastor
 - SAS President Kruger (F150), a former ship of the South African Navy
 - Psychokinesis, an alleged psychic ability allowing a person to influence objects without physical interaction
 - Pre-kindergarten
 - Indonesia (aircraft registration prefix PK)
 - PK, in List of chewing gum brands
 
See also
- Piquet, a trick-taking card game for two players
 
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