CLS may refer to: Academic fields Critical legal studies, school of legal philosophy Constrained least square statistical estimator CLs method to set bounds on particle physics model parameters The .cls file extension, used to hold LaTeX manuscripts - see LaTeX § Compatibility and converters Education California Labor School, San Francisco, US 1942–57 City of London School, UK Covington Latin School, Kentucky, US Crystal Lake South High School, Illinois, US Chicago Law School at The University of Chicago, US Columbia Law School at Columbia University, US Cornell Law School at Cornell University, US Coalition of Latino and Latina Scholars at Teachers College, Columbia University, US Critical Language Scholarship Program of the US State Department Societies and associations Caribbean Labour Solidarity, based in London, UK Chicago Linguistic Society Christian Legal Society Communist League of Struggle, US, 1931-1937 Software and technology Cable landing station, where a submarine cable comes ashore Common Language Specification, Microsoft CLS (command) to clear computer screen in several environments CLS (CONFIG.SYS directive), in DR-DOS Creative Lighting System, in Nikon speedlights Medical and science Computational Science, an academical research discipline Canadian Light Source, a synchrotron light source Clinical laboratory science, another name for Medical Technology or Medical Laboratory Science Combat lifesaver, US non-medical military role Music City of London Sinfonia CLS Music, a record label Cali Life Style, a Hip Hop act Transportation and vehicles Capsule launch system for space capsules Mercedes-Benz CLS-Class, automobile models Business and finance CLS Group, a global financial market utility Celestica, New York Stock Exchange symbol CLS Communication, translation services CLS Holdings, UK investment company Core Labor Standards, ILO