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
• Paperinik, a cartoon character
• Peacekeepers (Farscape), in the Farscape television show

• 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

• 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

• PK, or Busan–Gyeongnam Area, a metropolitan area in South Korea
• Pakistan (ISO country code)
• Possum Kingdom Lake, Texas, US
• Pickering, Ontario, Canada

Chemistry and pharmacology

• pK, negative logarithm of the dissociation constant K (-logK)
• href="/wiki/Pharmacoki