# PK

PK or pk may refer to:

## Arts and entertainment
### Gaming

* Probability of kill (P$_k$), 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
** PK (soundtrack), its soundtrack by Shantanu Moitra, Ajay–Atul and Ankit Tiwari
* 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
* Pawan Kalyan (born 1971), Indian film actor and politician
* 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

* Primary key, a unique attribute within the relational model of databases
* 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