CTL can refer to: Champions Tennis League, a tennis championship league in India Chronic training load, cumulative sports training Circuit Total Limitation, US standard for electrical panels Coal to liquids, coal liquefaction Combat Tank, Light such as the Marmon-Herrington CTLS Commission de transport de la Ville de Laval Complex Text Layout in typesetting Core Transfer Library, a list of college courses for transfer credit among educational institutions in Indiana Cut-to-length logging Cytotoxic T lymphocyte Constructive total loss, in marine insurance Companies Computer Technology Limited, a British computer manufacturer of the 1970s and 1980s Communications Technology Laboratory, a NIST laboratory since 2010 CTL Corporation, manufacturer of Chromebooks Computing Certificate Transparency Logs Computation tree logic Control key, a computer keyboard key CTL timecode, a timecode used on video tape Transportation Centralia, Washington (Amtrak station), USA, Amtrak station code Charleville Airport, Queensland, Australia (IATA airport code)