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

Arts and media

Armenia 2 Second Armenian TV Channel Company ( hy, Հայկական երկրորդ հեռուստաալիք), also known as H2 ( hy, Հ2) or Armenia 2, is a private television company broadcasting in Armenia and Artsakh. Approximately 95% of the TV viewers ...

(H2), a private television company broadcasting in Armenia and Nagorno-Karabakh *

H2 (A&E Networks) H2 (or History2) is a brand name owned by A&E Networks (a joint venture between the Hearst Communications and the Walt Disney Television division of The Walt Disney Company), used for a sister television channel of History. The brand was debuted i ...

, the rebranded name of the former channel ''History International'' **

H2 (American TV channel) H2 (formerly History International) was an American specialty television channel that was owned by A+E Networks (a joint venture between the Hearst Corporation and the Disney–ABC Television Group), available on multi-channel television provide ...

, the American version of the channel * ''H2'' (manga), a baseball manga by Mitsuru Adachi * ''

Halo 2 ''Halo 2'' is a 2004 first-person shooter game developed by Bungie and published by Microsoft Game Studios for the Xbox console. ''Halo 2'' is the second installment in the ''Halo'' franchise and the sequel to 2001's critically acclaimed '' ...

'', a video game for the Xbox, created and developed by Bungie * ''Halloween II'' (2009 film), initially abbreviated to ''H2'' * ''

Hollywood Squares ''Hollywood Squares'' (originally ''The Hollywood Squares'') is an American game show in which two contestants compete in a game of tic-tac-toe to win cash and prizes. The show Television pilot, piloted on NBC in 1965 and the regular series debut ...

'', 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) H2 is a relational database management system written in Java. It can be embedded in Java applications or run in client-server mode. The software is available as open source software Mozilla Public License 2.0 or the original Eclipse Public Lice ...

, an open-source Java SQL database-management system * DSC-H2, a 2006 Sony Cyber-shot H series camera *

HTTP/2 HTTP/2 (originally named HTTP/2.0) is a major revision of the HTTP network protocol used by the World Wide Web. It was derived from the earlier experimental SPDY protocol, originally developed by Google. HTTP/2 was developed by the HTTP Working ...

, 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 LGA 1155, also called Socket H2, is a zero insertion force flip-chip land grid array (LGA) CPU socket designed by Intel for their CPUs based on the Sandy Bridge (2nd Gen) and Ivy Bridge (3rd Gen) microarchitectures. It is the successor of L ...

CPU socket, also known as Socket H2

Roads and transportation

Interstate H-2 Interstate H-2 (H-2, named the Veterans Memorial Freeway) is an intrastate Interstate Highway located on the island of O‘ahu in the U.S. state of Hawai‘i. The north–south freeway connects H-1 in Pearl City to Mililani and Wahiawā, wh ...

, a highway in Hawaii, located on the island of Oahu *

London Buses route H2 This is a list of Transport for London (TfL) contracted bus routes in London, England, as well as commercial services that enter the Greater London area (except coaches). Bus services in London are operated by Abellio London, Arriva London, ...

Science and mathematics

Biology and medicine

* ATC code H02 ''Corticosteroids for systemic use'', a subgroup of the Anatomical Therapeutic Chemical Classification System * British NVC community H2, a heath community in the British National Vegetation Classification system * Histamine H₂ receptor *

Prostaglandin H2 Prostaglandin H2 is a type of prostaglandin and a precursor for many other biologically significant molecules. It is synthesized from arachidonic acid in a reaction catalyzed by a cyclooxygenase enzyme. The conversion from Arachidonic acid to Pro ...

* H-2, the Major histocompatibility complex of the mouse (equivalent of the Human Leukocyte Antigens) *

H^2

h^2

, wide- or narrow-sense heritability

Chemistry

* H₂, the chemical formula for

hydrogen Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxic ...

gas (dihydrogen) *

Deuterium Deuterium (or hydrogen-2, symbol or deuterium, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one ...

(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 An H II region or HII region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundreds ...

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

Hardy space In complex analysis, the Hardy spaces (or Hardy classes) ''Hp'' are certain spaces of holomorphic functions on the unit disk or upper half plane. They were introduced by Frigyes Riesz , who named them after G. H. Hardy, because of the paper . I ...

H²

Vehicles

Air and space

* H-II, a family of Japanese liquid-fueled rockets **

H-IIA H-IIA (H-2A) is an active expendable launch system operated by Mitsubishi Heavy Industries (MHI) for the Japan Aerospace Exploration Agency. These liquid fuel rockets have been used to launch satellites into geostationary orbit; lunar o ...

H-IIB H-IIB (H2B) was an expendable space launch system jointly developed by the Japanese government's space agency JAXA and Mitsubishi Heavy Industries. It was used to launch the H-II Transfer Vehicle (HTV, or ''Kōnotori'') cargo spacecraft for ...

** H-II Transfer Vehicle, a Japan Aerospace Exploration Agency unmanned spacecraft * H-2 MUPSOW, a precision-guided glide bomb manufactured by Pakistan * Landgraf H-2, an American single-seat twin-rotor helicopter produced in 1944 *

Standard H-2 The Standard H-2 was an early American Army reconnaissance aircraft, ordered in 1916. The H-2 was built by the Standard Aircraft Corporation, and previously known as the Sloane H-2. It was an open-cockpit three-place tractor biplane, powered by ...

, a U.S. Army reconnaissance plane produced in 1916

Automobiles

Haval H2 The Haval H2 is a subcompact B-Segment CUV produced by the Chinese manufacturer Great Wall Motor. History The Haval H2 Red Label debuted on the 2014 Beijing Auto Show. Despite having a Red Haval badge, the crossover was launched before the Red ...

, a Chinese subcompact SUV *

Hummer H2 The Hummer H2 is a large SUV that was marketed by Hummer and built in the AM General facility under contract from General Motors from 2002 to 2009. It is based on a modified GMT820 GM three-quarter-ton pickup truck in the front and a half-ton 1 ...

, an American full-size SUV

Motorcycles

Kawasaki H2 Mach IV The Kawasaki H2 Mach IV was a 750 cc 3-cylinder two-stroke production motorcycle manufactured by Kawasaki. The H2 was a Kawasaki triple sold from September 1971 through 1975. A standard, factory produced H2 was able to travel a quarter mile ...

, 1970s two-stroke motorcycle *

Kawasaki Ninja H2 The Kawasaki Ninja H2 is a " supercharged supersport"-class motorcycle in the Ninja sports bike series manufactured by Kawasaki, featuring a variable-speed centrifugal supercharger. Its namesake is the 750 cc Kawasaki H2 Mach IV, an ...

, 2010s supercharged motorcycle

Rail

* LB&SCR H2 class, a British LB&SCR locomotive * H02 locomotive (Germany), a high-pressure steam locomotive made in 1930 *

Saxon XII H2 The Saxon Class XII H2 steam locomotives (also nicknamed ''Sächsischer Rollwagen'' or 'Saxon rollers') were bought by the Royal Saxon State Railways (''Königlich Sächsische Staatseisenbahnen'') specifically for the mountainous areas of Saxony. ...

, a German steam locomotive produced in 1922 * PRR H2, a model within the American

PRR locomotive classification Locomotive classification on the Pennsylvania Railroad took several forms. Early on, steam locomotives were given single-letter classes. As the 26 letters were quickly assigned, that scheme was abandoned for a more complex system. This was used fo ...

* H2, designation for

METRORail METRORail is the light rail system in Houston, Texas (United States). In , the system had a ridership of , or about per weekday as of . METRORail ranks as the second most-traveled light rail system in the Southern United States and the 12th ...

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

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 H-2 Air Base (code-named 202B) is a former Iraqi Air Force base in the Al-Anbar Governorate of Iraq. It was captured by U.S.-led Coalition forces during Operation Iraqi Freedom in 2003. Overview H-2 is located in southern Iraq approximately 350 ...

, a military air base in Iraq *

H2 (classification) H2 is a para-cycling classification. The Union Cycliste Internationale recommends this be coded as MH2 or WH2. Definition Union Cycliste Internationale (UCI) defines H2 as: *Tetraplegia C7/C8 and severe athetosis/ataxia/dystonia * Tetraplegic w ...

, a para-cycling classification *

H-2A Visa An H-2A visa allows a foreign national worker into the United States for temporary agricultural work. There are several requirements of the employer in regard to this visa. The H-2A temporary agricultural program establishes a means for agricu ...

, a United States visa for temporary or seasonal agricultural work * H2, the second half of the business year * H2 lamp, a halogen vehicle

headlamp A headlamp is a lamp attached to the front of a vehicle to illuminate the road ahead. Headlamps are also often called headlights, but in the most precise usage, ''headlamp'' is the term for the device itself and ''headlight'' is the term for ...

no longer manufactured * H2, a model of

hurricane tie A tie, strap, tie rod, eyebar, guy-wire, suspension cables, or wire ropes, are examples of linear structural components designed to resist tension. It is the opposite of a strut or column, which is designed to resist compression. Ties may be m ...

manufactured by Simpson Strong-Tie Co. *

Sky Airline Sky Airline, styled as SꓘY, is an airline based at Comodoro Arturo Merino Benítez International Airport in Santiago, Chile. It is the second largest airline in the country behind flag-carrier LATAM Airlines and the first airline to operate u ...

(IATA code H2) * Area H2, an Israeli-controlled area under the Hebron Protocol *H2 as the nickname for New Zealand civil servant Heather Simpson