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
- HD (commentator) or HDStarcraft, former e-sports commentator
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
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
- 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
See also
Topics referred to by the same term
This disambiguation page lists articles associated with the title HD.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: