HSL

HSL may refer to:

Science, technology and computing

 * HSL (Fortran library), a numerical software library
 * HSL and HSV color space
 * Health and Safety Laboratory, UK
 * Hormone-sensitive lipase, a protein
 * Hybrid solar lighting

Transport

 * Bell HSL, a 1950s U.S. Navy antisubmarine helicopter
 * Haslemere railway station in England
 * Helsinki Regional Transport Authority (Helsingin seudun liikenne), Finland
 * Hindustan Shipyard, in Visakhapatnam, Andhra Pradesh, India
 * Hispania Líneas Aéreas, a defunct Spanish airline
 * HSL Logistik, a German train operator
 * Huslia Airport, in Alaska, US
 * High-speed rail lines in Benelux HSL 1, HSL 2 HSL 3 HSL 4, and HSL-Zuid
 * HSL-34 to HSL-94: Former US Navy helicopter Anti-submarine (Light) squadrons

Other uses

 * Hausa Sign Language, Kano, Nigeria
 * Hawaiʻi Sign Language, Hawaii, United States
 * Hamburg School of Logistics, now Kühne Logistics University, Germany
 * Staff Selection Commission Combined Higher Secondary Level Exam or CHSL/HSL, civil service examination by the Staff Selection Commission for governmental posts in India