HD may refer to:
Business H-D or Harley-Davidson, a motorcycle manufacturer The Home Depot, NYSE stock symbol: HD
Chemistry Hydrogen deuteride, a diatomic compound of hydrogen and deuterium Mustard gas
Codes Air Do, formerly Hokkaido International Airlines, IATA designator HD postcode area, covering Huddersfield, Brighouse and Holmfirth in England, UK Heidelberg's vehicle registration plate code Hunedoara County (Romania)'s ISO 3166 code
Medicine Hansen's disease or leprosy Hirschsprung's disease, a disorder of the abdomen Huntington's disease, a genetic disorder affecting the central nervous system HD (gene) or huntingtin, the IT15 gene, which codes for the huntingtin protein
People H.D. or Hilda Doolittle (1886–1961), American poet and novelist
Technology Hard drive, an electro-mechanical data storage device Hash digest, the output of a hash function HD Photo, an image format HD Radio, an abbreviation from the term hybrid digital/analog radio HD Voice, or wideband audio Heavy Duty (disambiguation) High density, a diskette density High-definition television (HDTV), a resolution that is substantially higher than that of standard-definition television 720p (HD), a progressive HDTV signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9 1080p (Full HD), or 1080i 4K HD (Ultra HD), or 8K UHD High-definition video, video of higher resolution and quality than standard-definition Intel High Definition Audio, a specification for the audio sub-system of personal computers
Other uses Helsingborgs Dagblad, a Swedish newspaper Henry Draper Catalogue, an astronomical catalogue often used to designate stars Department of Highways (disambiguation) Högsta Domstolen, the Supreme Court of Sweden Hurter and Driffield Numbers or H&D, an old scale for measuring film speed
See also