CLASS

CLASS may refer to:

Organizations

 * Canadian Light Aircraft Sales and Service, a Canadian aircraft manufacturer
 * Class (warez), a group from 1997 to 2004
 * College of Liberal Arts and Social Sciences, an academic college at the University of Houston, US
 * Centre for Labour and Social Studies, chaired by Laura Pidcock

Science and technology

 * Canadian Land Surface Scheme, for use in large scale climate models
 * Cosmology Large Angular Scale Surveyor, an experiment to measure the polarization of the cosmic microwave background
 * Custom Local Area Signaling Services, which describes telephony terms e.g. call waiting, caller ID

Other

 * Consular Lookout and Support System, a system supporting the U.S. Department of State's Bureau of Consular Affairs