H1, H-1, H01, H I may refer to:

Places

Interstate H-1 Interstate H-1 (abbreviated H-1) is the longest and busiest Interstate Highway in the US state of Hawaii. The highway is located on the island of O‘ahu. Despite the number, this is an east–west highway; the 'H'-series (for Hawaii) numbering r ...

, a highway in Hawaii * Area H1, the area of Hebron controlled by the Palestinian Authority under the

Hebron Protocol The Protocol Concerning the Redeployment in Hebron, also known as the Hebron Protocol or Hebron Agreement, was signed on 17 January 1997 by Israel, represented by Prime Minister of Israel Benjamin Netanyahu, and the Palestine Liberation Organiz ...

Science

H1 (particle detector) H1 was a particle detector operated at the HERA (''Hadron Elektron Ring Anlage'') collider at the German national laboratory DESY in Hamburg. The first studies for the H1 experiment were proposed in 1981. The H1 detector began operating together ...

Histamine H1 receptor The H1 receptor is a histamine receptor belonging to the family of rhodopsin-like G-protein-coupled receptors. This receptor is activated by the biogenic amine histamine. It is expressed in smooth muscles, on vascular endothelial cells, in the h ...

* Histone H1, a protein *

British NVC community H1 NVC community H1 (''Calluna vulgaris - Festuca ovina'' heath) is one of the Heaths in the British National Vegetation Classification system, heath Terminology used in connection with the British National Vegetation Classification, communities in th ...

, a heath zone *

Hydrogen atom A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen consti ...

(H₁) * Protium (isotope), an isotope of hydrogen *

H I region An HI region or H I region (read ''H one'') is a cloud in the interstellar medium composed of neutral atomic hydrogen (HI), in addition to the local abundance of helium and other elements. (H is the chemical symbol for hydrogen, and "I" is the Ro ...

, a cloud in the interstellar medium * ATC code H01 ''Pituitary and hypothalamic hormones and analogues'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

Haplogroup H1 (disambiguation) Haplogroup H1 may refer to: * H1, in human mitochondrial DNA, a haplogroup contained in a significant fraction of individuals of Western European heritage * H1, in human Y-chromosome DNA, a haplogroup common in South Asian individuals * H1, ...

, a grouping in genetics based on certain similarities *

Alternative hypothesis In statistical hypothesis testing, the alternative hypothesis is one of the proposed proposition in the hypothesis test. In general the goal of hypothesis test is to demonstrate that in the given condition, there is sufficient evidence supporting ...

(H₁)

Technology

* , level 1 heading markup for HTML Web pages; see

HTML element An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). The first used version of HTML was written by Tim Berners-Lee in 1993 ...

DSC-H1 Notes: * DSC is an abbreviation for Digital Still Camera * Models without a “V” suffix do not include built-in GPS functionality D series F series G series H series All cameras used CCD sensors and had optical imag ...

, a Sony Cybershot digital camera * H1, John Harrison's first marine chronometer * Tianwen-1 (formerly ''Huoxing-1''), first Chinese space probe to reach Mars *

H-1NF The H-1NF (or H-1 Australian Plasma Fusion Research Facility) was a research institute of the H-1 heliac, a large stellarator device located in the ANU Research School of Physics at Canberra, Australia. It was established when the H-1 heliac was pr ...

, the Australian Plasma Fusion Research Facility, formerly H-1 Heliac stellarator

Transportation

H1 Lamp The H1 is a halogen lamp designed for use in automotive headlamps and fog and driving lamps. It has also been widely applied in emergency vehicle lights. Origin The H1 was the first halogen lamp approved for automotive use. It was introduced in ...

, an automotive halogen light bulb *

H-I The H–I or H–1 was a Japanese liquid-fuelled carrier rocket, consisting of a licence-produced American first stage and set of booster rockets, and all-Japanese upper stages. The H in the name represented the use of liquid hydrogen fuel in the ...

or H–1, a Japanese rocket *

Rocketdyne H-1 The Rocketdyne H-1 was a thrust liquid-propellant rocket engine burning LOX and RP-1. The H-1 was developed for use in the S-I and S-IB first stages of the Saturn I and Saturn IB rockets, respectively, where it was used in clusters of eight e ...

, a liquid-propellant rocket engine

Aviation

* Bell Huey family Bell H-1, series of helicopters with that designation * Hooters Air airline *

Hughes H-1 Racer The Hughes H-1 Racer is a racing aircraft built by Hughes Aircraft in 1935. It set a world airspeed record and a transcontinental speed record across the United States. The H-1 Racer was the last aircraft built by a private individual to set the ...

, a racing aircraft

Motor vehicles

Haval H1 The Haval H1 or formerly the Great Wall Haval M4 is a Subcompact crossover, subcompact Sport utility vehicle, SUV produced by the Chinese manufacturer Great Wall Motors, Great Wall. It was essentially a rebadged and lifted Great Wall Florid, until ...

, a Chinese subcompact crossover * Hummer H1, an American full-size SUV *

Hyundai H-1 Hyundai H-1 is a nameplate of a van and pickup truck used by Hyundai Motor Company in European export markets for three related models: * Hyundai Starex, (called i800 in Europe and H-200 in the Netherlands) a minibus/van * Hyundai Libero The Hyun ...

, a South Korean commercial van * Tiger H1, a German heavy tank used during WW2

Motorcycles

Kawasaki H1 Mach III The Kawasaki H1 Mach III was a two-stroke 500 cc sport bike made by Kawasaki from 1969 through to 1975. History By mid-1960s, the US had become the largest motorcycle market. American riders were demanding bikes with more horsepower and hig ...

, road motorcycle * Kawasaki H1R, racing motorcycle

Ships

* HMS ''H1'', a 1915 British Royal Navy H-class submarine * HMS ''Hotspur'' (H01), a 1935 British Royal Navy H-class destroyer * USS ''H-1'', a 1913 United States Navy submarine

Rail

* LB&SCR H1 class, locomotive * LNER Class H1, locomotive *Designation for METRORail

Siemens S70 The Siemens S70, its successor the S700 and European variant, the Avanto, are a series of low-floor light-rail vehicles (LRV) and streetcars manufactured by Siemens Mobility, a division of German conglomerate Siemens AG. The S70 and S700 are ...

light rail vehicles

Time

*H1 may refer to the first half of the

business year A fiscal year (or financial year, or sometimes budget year) is used in government accounting, which varies between countries, and for budget purposes. It is also used for financial reporting by businesses and other organizations. Laws in many ju ...

, while H2 refers to the second half.

Other uses

H1 (classification) H1 is a para-cycling classification. It includes people with a number of disability types including spinal cord injuries and cerebral palsy. Handcycles that can be used by people in races include the AP2 recumbent and AP3 recumbent. The classificat ...

, a para-cycling classification * , one of the three laryngeals in the reconstructed Proto-Indo-European language * H1 Unlimited, a premier unlimited hydroplane racing league *''

Hora Um da Notícia ''Hora Um da Notícia'', also known as simply ''Hora Um'', is an early morning two hour-long news program aired by the Brazilian television broadcaster Rede Globo, which debuted on December 1, 2014, replacing the daily edition of the ''Globo Rural ...

'', a news program aired by

Rede Globo TV Globo (, "Globe TV", or simply Globo), formerly known as Rede Globo, is a Brazilian free-to-air Television broadcasting, television network, launched by media proprietor Roberto Marinho on 26 April 1965. It is owned by media conglomerate Gr ...