HSL

HSL may refer to:

Companies

• Heeling Sports Limited, which owns the Heelys and Soap Shoes brands
• Hindustan Shipyard Limited in Visakhapatnam, India.

Science, technology and computing

• HSL color space (hue, saturation, lightness)
• High Speed Link in telephony
• Homoserine lactone, a bacterial quorum sensing molecule
• Hormone-sensitive lipase, a protein found in the cytosol of adipocytes important in the hydrolysis of triacylglycerols.
• Harwell Subroutine Library, a library of FORTRAN Numerical Analysis Subroutines.
• Health and Safety Laboratory, an agency of the Health and Safety Executive in the UK.

Transport

• Hogesnelheidslijn, high-speed railway lines in the Netherlands: HSL-Zuid, HSL-Oost
• High Speed Line, high-speed railway lines in Belgium: HSL 1, HSL 2, HSL 3, HSL 4
• Haslemere railway station in Haslemere, Surrey, England, UK
• Helsingin Seudun Liikenne, a public transport administration in the Helsinki Metropolitan Area, Finland

Other

• Hawaii State Library
• Helicopter Anti-Submarine Squadron (Light), in the United States Navy
• Hero of Socialist Labour, an honorary title and the highest degree of distinction for exceptional achievements in economy and culture in the Soviet Union.
• Hamburg School of Logistics, now Kühne School of Logistics and Management, a German business school
• Helsingin Shakkiliitto, a Finnish chess organisation