CK

• 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 (fashion house), a fashion company • CH. Karnchang, a Thai contractor and construction firm • 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 • Cranbrook Kingswood, a school in the US == See also ==