HD may refer to:

Business

* H-D or Harley-Davidson, a motorcycle manufacturer *

The Home Depot The Home Depot, Inc., is an American multinational home improvement retail corporation that sells tools, construction products, appliances, and services, including fuel and transportation rentals. Home Depot is the largest home improvement re ...

, NYSE stock symbol: HD

Chemistry

* Hydrogen deuteride, a diatomic compound of hydrogen and deuterium *

Mustard gas Mustard gas or sulfur mustard is a chemical compound belonging to a family of cytotoxic and blister agents known as mustard agents. The name ''mustard gas'' is technically incorrect: the substance, when dispersed, is often not actually a gas, b ...

Codes

* Air Do, formerly Hokkaido International Airlines, IATA designator *

HD postcode area The HD postcode area, also known as the Huddersfield postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of nine postcode districts in England, within three post towns. These cover southern West Yorkshire, including Huddersf ...

, covering Huddersfield, Brighouse and Holmfirth in England, UK *

Heidelberg Heidelberg (; Palatine German language, Palatine German: ''Heidlberg'') is a city in the States of Germany, German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914 ...

's vehicle registration plate code *

Hunedoara County Hunedoara County () is a county ('' județ'') of Romania, in Transylvania, with its capital city at Deva. The county is part of the Danube–Criș–Mureș–Tisa Euroregion. Name In Hungarian, it is known as , in German as , and in Slovak as ...

(Romania)'s ISO 3166 code

Medicine

* Hansen's disease or leprosy *

Hirschsprung's disease Hirschsprung's disease (HD or HSCR) is a birth defect in which nerves are missing from parts of the intestine. The most prominent symptom is constipation. Other symptoms may include vomiting, abdominal pain, diarrhea and slow growth. Symptoms usu ...

, a disorder of the abdomen *

Huntington's disease Huntington's disease (HD), also known as Huntington's chorea, is a neurodegenerative disease that is mostly inherited. The earliest symptoms are often subtle problems with mood or mental abilities. A general lack of coordination and an unst ...

, a genetic disorder affecting the central nervous system ** HD (gene) or huntingtin, the IT15 gene, which codes for the huntingtin protein

People

H.D. Hilda Doolittle (September 10, 1886 – September 27, 1961) was an American modernist poet, novelist, and memoirist who wrote under the name H.D. throughout her life. Her career began in 1911 after she moved to London and co-founded the ...

or Hilda Doolittle (1886–1961), American poet and novelist *

HD (commentator) Alex Do, better known by his online alias HD or HDStarcraft, is a former e-sports commentator for ''StarCraft II'', a video game published by Blizzard Entertainment. He appears as a commentator at StarCraft tournaments worldwide and his commenta ...

or HDStarcraft, former e-sports commentator

Other uses

* ''

Helsingborgs Dagblad ''Helsingborgs Dagblad'' (''HD'', lit. "Helsingborg's Daily Paper"), published in Helsingborg in Skåne is the largest (circ. 84.000) newspaper in Swedish outside the metropolitan districts of Malmö, Göteborg and Stockholm. History and profi ...

'', 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 A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnet ...

, an electro-mechanical data storage device * ''Hash digest'', the output of a hash function *

HD Photo JPEG XR (JPEG extended range) is an image compression standard for continuous tone photographic images, based on the HD Photo (formerly Windows Media Photo) specifications that Microsoft originally developed and patented. It supports both lossy a ...

, an image format *

HD Radio HD Radio (HDR) is a trademark for an in-band on-channel (IBOC) digital radio broadcast technology. It generally simulcasts an existing analog radio station in digital format with less noise and with additional text information. HD Radio is used ...

, an abbreviation from the term hybrid digital/analog radio *

HD Voice Wideband audio, also known as wideband voice or HD voice, is high definition voice quality for telephony audio, contrasted with standard digital telephony "toll quality". It extends the frequency range of audio signals transmitted over telephone ...

, or wideband audio * Heavy Duty (disambiguation) * High density, a diskette density *

High-definition television High-definition television (HD or HDTV) describes a television system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since 1936; in more recent times, it refers to the g ...

(HDTV), a resolution that is substantially higher than that of standard-definition television **

720p 720p (1280×720 px; also called HD ready, standard HD or just HD) is a progressive HDTV signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9, normally known as widescreen HDTV (1.78:1). All major HDTV broadcast ...

(HD), a progressive HDTV signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9 *

High-definition video High-definition video (HD video) is video of higher resolution and quality than standard-definition. While there is no standardized meaning for ''high-definition'', generally any video image with considerably more than 480 vertical scan lines (No ...

, video of higher resolution and quality than standard-definition * Intel High Definition Audio, a specification for the audio sub-system of personal computers