HLS may refer to:
Organisations Harlington Locomotive Society, London, England Huntingdon Life Sciences, a British contract research organisation HLS Ost (; ), German WWII cryptanalysis station
Education Harvard Law School, Cambridge, Massachusetts, US Helen Lowry Higher Secondary School, Mizoram, India Highlands Latin School, Louisville, Kentucky, US
Technology HTTP Live Streaming, a media streaming communications protocol HLS color space, a representation of points in an RGB color model High-level synthesis, an automated design process
Transportation Human Landing System, a NASA program to choose a Moon landing system for the 2020s Starship HLS, a modified version of the SpaceX Starship Heavy Logistics System, a USAF program to develop the Lockheed C-5 Galaxy Lockheed C-5 Galaxy, the winner of the USAF HLS project Haiti Air Freight (ICAO airline code HLS); see List of defunct airlines of Haiti St Helens Airport (IATA airport code HLS), Tasmania, Australia Hilsea railway station (station code HLS), England, UK
Other uses Historical Dictionary of Switzerland (German: Historisches Lexikon der Schweiz) Holy See; also UNDP country code for Vatican City Himalayan Languages Symposium, an annual academic conference on Trans-Himalayan languages
See also
Health and life sciences; see health sciences and life sciences
HL (disambiguation) HIS (disambiguation)