H2, H02, or H-2 may refer to:

Arts and media

* Armenia 2 (H2), a private television company broadcasting in Armenia and Nagorno-Karabakh * H2 (A&E Networks), the rebranded name of the former channel ''History International'' ** H2 (American TV channel), the American version of the channel * ''H2'' (manga), a baseball manga by Mitsuru Adachi * '' Halo 2'', a video game for the Xbox, created and developed by Bungie * ''Halloween II'' (2009 film), initially abbreviated to ''H2'' * '' Hollywood Squares'', referred to as ''H²'' informally during the 2002–2004 seasons

Computing

* , level 2 heading markup for HTML Web pages, see HTML element#heading * H2 (DBMS), an open-source Java SQL database-management system *

DSC-H2 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 image ...

, a 2006 Sony Cyber-shot H series camera * HTTP/2, major revision of HTTP, often abbreviated in discussions as h2, and identifying itself to other servers as h2 in TLS negotiation or h2c in the HTTP Upgrade header * LGA 1155 CPU socket, also known as Socket H2

Roads and transportation

* Interstate H-2, a highway in Hawaii, located on the island of Oahu * London Buses route H2

Science and mathematics

Biology and medicine

ATC code H02 H02A Corticosteroids for systemic use, plain H02AA Mineralocorticoids :H02AA01 Aldosterone :H02AA02 Fludrocortisone :H02AA03 Desoxycortone H02AB Glucocorticoids :H02AB01 Betamethasone :H02AB02 Dexamethasone :H02AB03 Fluocortolone :H02AB04 Methy ...

''Corticosteroids for systemic use'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

British NVC community H2 NVC community H2 (''Calluna vulgaris - Ulex minor'' heath) is one of the heath communities in the British National Vegetation Classification system. It is one of five communities categorised as lowland dry heaths. It has a localised distribution i ...

, a heath community in the British National Vegetation Classification system * Histamine H₂ receptor * Prostaglandin H2 * H-2, the

Major histocompatibility complex The major histocompatibility complex (MHC) is a large locus on vertebrate DNA containing a set of closely linked polymorphic genes that code for cell surface proteins essential for the adaptive immune system. These cell surface proteins are calle ...

of the mouse (equivalent of the Human Leukocyte Antigens) *

H^2

h^2

, wide- or narrow-sense

heritability Heritability is a statistic used in the fields of breeding and genetics that estimates the degree of ''variation'' in a phenotypic trait in a population that is due to genetic variation between individuals in that population. The concept of h ...

Chemistry

* H₂, the chemical formula for hydrogen gas (dihydrogen) * Deuterium (Hydrogen-2, H-2, ²H), the isotope of hydrogen with one proton, one neutron, and one electron

Other uses in science and mathematics

* H II region, a region of interstellar atomic hydrogen that is ionized * , one of the three laryngeals in the reconstructed Proto-Indo-European language * The Hardy space H²

Vehicles

Air and space

* H-II, a family of Japanese liquid-fueled rockets ** H-IIA ** H-IIB ** H-II Transfer Vehicle, a Japan Aerospace Exploration Agency unmanned spacecraft *

H-2 MUPSOW The H-2 SOW (Stand-Off Weapon) is a precision-guided glide bomb manufactured by NESCOM and deployed by the Pakistan Air Force, capable of striking targets at stand-off range. It has a terminal guidance system based on an infra-red imaging seeker ...

, a precision-guided glide bomb manufactured by Pakistan *

Landgraf H-2 The Landgraf H-2 was an American single-seat twin-rotor helicopter designed by Fred Landgraf and built by the Landgraf Helicopter Company of Los Angeles, California. Although awarded a development contract by the United States Army, it was not de ...

, an American single-seat twin-rotor helicopter produced in 1944 * Standard H-2, a U.S. Army reconnaissance plane produced in 1916

Automobiles

* Haval H2, a Chinese subcompact SUV * Hummer H2, an American full-size SUV

Motorcycles

* Kawasaki H2 Mach IV, 1970s two-stroke motorcycle * Kawasaki Ninja H2, 2010s supercharged motorcycle

Rail

LB&SCR H2 class The London, Brighton and South Coast Railway H2 class was a class of 4-4-2 steam locomotives for express passenger work. They were designed when D. E. Marsh was officially Locomotive Superintendent, and were built at Brighton Works in 1911 a ...

, a British LB&SCR locomotive *

H02 locomotive (Germany) The DRG H 02 1001 was a remarkable high-pressure steam locomotive, built by the engineering firm of Schwarzkopff to the design of Dr L. Löffler. The aim was not only to improve fuel economy—the usual reason for adopting high steam pressu ...

, a high-pressure steam locomotive made in 1930 * Saxon XII H2, a German steam locomotive produced in 1922 * PRR H2, a model within the American PRR locomotive classification * H2, designation for METRORail Siemens S70 light rail vehicles

Sea

* HMAS ''Success'' (H02), a Royal Australian Navy Admiralty S-class destroyer completed in 1918 * HMS ''Exmouth'' (H02), a British Royal Navy E-class destroyer commissioned in 1934 * HMS ''H2'', a British Royal Navy H class submarine commissioned in 1915 * USS ''H-2'' (SS-29), a U.S. Navy H-class submarine commissioned in 1913

Other uses

* H-2 Air Base, a military air base in Iraq * H2 (classification), a para-cycling classification * H-2A Visa, a United States visa for temporary or seasonal agricultural work * H2, the second 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 ...

* H2 lamp, a halogen vehicle headlamp no longer manufactured * H2, a model of hurricane tie manufactured by Simpson Strong-Tie Co. * Sky Airline (IATA code H2) * Area H2, an Israeli-controlled area 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 ...

*H2 as the nickname for New Zealand civil servant Heather Simpson