SCL may refer to: Computing System Control Language, of the ICL VME operating system SC++L, the C++ standard library Software Collections in the CentOS Linux distribution System Command Language of the NOS/VE CDC Cyber operating system Structured Control Language, for programming PLCs Language Shina language, spoken by the Shina people in Gilgit-Baltistan, Pakistan Organizations SCL Group, a British data analysis and communication company Seattle City Light, public utility in Seattle, Washington, United States Southeastern Composers League Stanford Center on Longevity (SCL) Stanford University; see Stanford University centers and institutes National Senior Classical League Society of Chief Librarians, former name of Libraries Connected, British public library organisation Society of Construction Law Science and technology Sculptor (constellation), astronomical abbreviation Serial clock, a signal in I²C electronic messaging bus Short circuit level Skin conductance level, in medicine Substation Configuration Language, for electrical substations Structural composite lumber, an engineered wood Semi-Conductor Laboratory of the Department of Space of India Other Comodoro Arturo Merino Benítez International Airport, Santiago, Chile by IATA airport code Seaboard Coast Line Railroad, by reporting mark Security characteristic line, plotting performance of a security Sha Tin to Central Link of the Hong Kong MTR transit system Studies in Canadian Literature, a literary journal See also Symptom Checklist 90 (SCL-90-R), psychometric instrument