CK

CK, Ck, or ck may refer to:

Science and technology

• Conductive keratoplasty, a type of refractive surgery
• Creatine kinase, an enzyme
• Cytokinin, a plant hormone
• Cytokeratin (CK1 to CK20), keratin proteins
• Cyanogen chloride, an inorganic chemical

Computing

• .ck, the Internet country code top-level domain for the Cook Islands
• Collective Knowledge (software), a framework for collaborative and reproducible research

Organizations

• Calvin Klein, a fashion company
• Chowking, a Filipino fast food chain
• Colombo Kings, a team participating in Lanka Premier League
• CK Hutchison Holdings, a multinational conglomerate headquartered in Hong Kong
• Bloods, a US-based street gang, from the nickname "Crip Killer"
• Circle K, an international chain of convenience stores

Transportation

• China Cargo Airlines (IATA code CK)
• Composite Corridor, a designation of British Rail carriages
• Chevrolet C/K, a model of pickup truck

People

• Louis C.K. (born 1967), American comedian
• Con Kolivas, Australian anaesthetist

Other uses

• ck (digraph), a letter combination used in spelling
• C-K theory (concept-knowledge theory), in design
• CK (album), a 1988 album by Chaka Khan
• Civilinis kodeksas, the Code of Lithuania
• Core Knowledge, a textbook series
• Cranbrook Kingswood, a school in the US

See also

• CAK (disambiguation)
• KC (disambiguation)