HST

HST may refer to:

Science and technology

 * The Hubble Space Telescope
 * Harvard–MIT Program of Health Sciences and Technology
 * The history of science and technology
 * High-speed telegraphy, a radiosport
 * High-Speed Transfer, a USRobotics modem protocol
 * Highstand systems tract, in the sequence stratigraphy branch of geology

Transportation

 * Hastings railway station, Melbourne
 * Helsinki City Transport (Swedish: Helsingfors stads trafikverk)
 * Heritage Shunters Trust, an English rail preservation society
 * High-speed trains in general, see high-speed rail
 * High Street (Glasgow) railway station, Scotland, station code
 * InterCity 125 or High Speed Train, UK

Other uses

 * Half-Square or Half Square Triangle a block in quilting
 * Harmonized sales tax, in Canada
 * Hawaii-Aleutian Standard Time (UTC−10)
 * Hegemonic stability theory, in international relations
 * Helicopter support team, in the United States Marine Corps
 * High Sierra Trail, in California, United States
 * Holden Street Theatres, Adelaide, Australia
 * Homestead Air Reserve Base, Florida, US, IATA code
 * Hospital Santo Tomas, in Panama City, Panama
 * Harry S. Truman, President of the United States
 * Hunter S. Thompson, American journalist and author
 * Host Hotels & Resorts, American REIT using the stock ticker $HST