Title: H2 Content: 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 (TV channel), the rebranded name of the former channel History International * 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, 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=== * H02, a code for "Other inflammation of eyelid" in ICD-10 Chapter VII: Diseases of the eye, adnexa * 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 * H-2, the Major histocompatibility complex of the mouse (equivalent of the Human Leukocyte Antigens) * H^2 or h^2, wide- or narrow-sense heritability ===Chemistry=== * H2, the chemical formula for hydrogen gas (Dihydrogen) * Hydrogen-2, H-2, 2H (called deuterium), 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, a precision-guided glide bomb manufactured by Pakistan * Landgraf H-2, an American single-seat twin-rotor helicopter produced in 1944 * Standard H-2, a U.S. Army reconnaissance plane produced in 1916 ===Rail=== * LB&SCR; H2 class, a British LB&SCR; locomotive * H02 locomotive (Germany), 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 ===Road=== * Hummer H2, a car model * Kawasaki H2 Mach IV, 1970s two-stroke motorcycle * Kawasaki Ninja H2, 2010s supercharged motorcycle ===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-2A Visa, a United States visa for temporary or seasonal agricultural work * H2, the second half of the business year * 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