CSL as an abbreviation may stand for:
Places Coordinated Science Laboratory, at the University of Illinois Liège Space Center (Centre spatial de Liège), at the University of Liege in Belgium Central Science Laboratory, a former UK DEFRA laboratory services agency Cabo San Lucas, a resort city located at the southern tip of the Baja California Peninsula, in Baja California Sur
Languages Croatian Sign Language, a sign language for the deaf in Croatia Chinese Sign Language, a sign language for the deaf in China, Malaysia, and Taiwan Clay Sanskrit Library, a series of books in Sanskrit with English translations Context-sensitive language, a class of formal languages in computational linguistics
Sciences Crosshole sonic logging, method for testing a constructed material Calcium stearoyl-2-lactylate, a food additive used as an emulsifier Continuous spontaneous localization, a dynamical reduction theory in quantum mechanics Hartmann's solution, compound sodium lactate, used in intravenous transfusions
Military Cooperative Security Location, a US military facility CSL, the designation code for Royal Australian Navy Wattle-class crane stores lighters
Computing Citation Style Language, an open XML-based standard to format citations and bibliographies Current-steering logic, an alternative name for emitter-coupled logic in electronics Context-sensitive language, a language generated from a context-sensitive grammar
Companies CSL Group Ltd, a British machine to machine communications company CSL Mobile, subsidiary of Hong Kong Telecom CSL Limited, an Australian biotechnology company, formerly Commonwealth Serum Laboratories CSL Behring, a subsidiary company of CSL Limited Canada Steamship Lines, a Canadian shipping company CSL Sofas, a furniture chain in the United Kingdom Cochin Shipyard Limited, a shipbuilding company in Kerala, India
Sports CAL Spora Luxembourg, amateur athletics club in Luxembourg Canadian Soccer League, a soccer league in Canada since 2006 Canadian Soccer League (1987–1992), a soccer league in Canada Chinese Super League, the premier league of association football in China Cosmopolitan Soccer League, a soccer league in United States IOC sport code for canoe slalom at the Summer Olympics
Politics Canadian Socialist League, a political party active from 1898 to 1904 Czechoslovak People's Party (Československá strana lidová, ČSL), a political party
Others CSL-TV, an American Forces Network television station in Lajes Field, Azores, Portugal Centers for Spiritual Living, a religious denomination Certain models of BMW car, designated BMW CSL Charter seat license, name used by a few sports teams for a personal seat license