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H3, H03 or H-3 may refer to:


Entertainment

* ''
Happy Hustle High ''Happy Hustle High'', originally known as , is a Japanese manga series written and illustrated by Rie Takada. The series is published in Japan by Shogakukan and in the United States in English by VIZ Media. Plot ''Happy Hustle High'' follows ...
'', a manga series by Rie Takada, originally titled "H3 School!" * ''H3'' (film), a 2001 film about the 1981 Irish hunger strike *
h3h3Productions h3h3Productions is a YouTube channel hosted by Ethan Klein and Hila Klein, an Israeli-American husband-and-wife duo. The majority of their content consists of reaction videos and sketch comedy in which they satirize internet culture. The ''H3 ...
, styled " 3, a satirical YouTube channel


Science

*
Triatomic hydrogen Triatomic hydrogen or H3 is an unstable triatomic molecule containing only hydrogen. Since this molecule contains only three atoms of hydrogen it is the simplest triatomic molecule and it is relatively simple to numerically solve the quantum mechan ...
(H3), an unstable molecule *
Trihydrogen cation The trihydrogen cation or protonated molecular hydrogen is a cation (positive ion) with formula , consisting of three hydrogen nuclei (protons) sharing two electrons. The trihydrogen cation is one of the most abundant ions in the universe. It is ...
(H3+), one of the most abundant ions in the universe *
Tritium Tritium ( or , ) or hydrogen-3 (symbol T or H) is a rare and radioactive isotope of hydrogen with half-life about 12 years. The nucleus of tritium (t, sometimes called a ''triton'') contains one proton and two neutrons, whereas the nucleus of ...
(Hydrogen-3, or H-3), an isotope of hydrogen *
ATC code H03 H03A Thyroid preparations H03AA Thyroid hormones :H03AA01 Levothyroxine sodium :H03AA02 Liothyronine sodium :H03AA03 Combinations of levothyroxine and liothyronine :H03AA04 Tiratricol :H03AA05 Thyroid gland preparations H03B Antithyroid pre ...
''Thyroid therapy'', a subgroup of the Anatomical Therapeutic Chemical Classification System * British NVC community H3, a heath community of the British National Vegetation Classification system * Histamine H3 receptor, a human gene *
Histone H3 Histone H3 is one of the five main histones involved in the structure of chromatin in eukaryotic cells. Featuring a main globular domain and a long N-terminal tail, H3 is involved with the structure of the nucleosomes of the 'beads on a stri ...
, a component of DNA higher structure in eukaryotic cells * , one of the three laryngeals in the reconstructed Proto-Indo-European language * Hekla 3 eruption, a huge volcanic eruption around 1000 BC


Computing

* , the level-3 HTML heading markup element *
HTTP/3 HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web, complementing the widely-deployed HTTP/1.1 and HTTP/2. Unlike previous versions which relied on the well-established TCP ( ...
, the third revision of a protocol for the World Wide Web * Socket H3, the common name of the
LGA 1150 LGA 1150, also known as Socket H3, is a zero insertion force flip-chip land grid array (LGA) CPU socket designed by Intel for CPUs built on the Haswell microarchitecture. This socket is also used by the Haswell's successor, Broadwe ...
CPU socket


Transportation


Air and space

*
H3 (rocket) The H3 Launch Vehicle is an expendable launch system in development in Japan. H3 launch vehicles are liquid-propellant rockets with strap-on solid rocket boosters and are planned to be launched from Tanegashima Space Center in Japan. Mitsubish ...
, an expendable launch system under development by Japan Aerospace Exploration Agency *
Harbour Air Seaplanes Harbour Air Seaplanes is a scheduled floatplane service, tour and charter airline based in Richmond, British Columbia, Canada. The predominantly seaplane airline specializes in routes between Vancouver, Nanaimo, Victoria, Sechelt, Comox, Whi ...
(IATA code), a Canadian charter airline *
H-3 Air Base H-3 Air Base (code-named 202C, 202D) is part of a cluster of former Iraqi Air Force bases in the Al-Anbar Governorate of Iraq. H3 is located in a remote stretch of Iraq's western desert, about 435 kilometers from Baghdad in western Iraq. It is cl ...
, former Iraqi Air Force base in western Iraq * H-3 Sea King, a United States Navy helicopter * Standard H-3, an improved version of the 1916 Standard H-2 aircraft


Automobiles

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Brilliance H3 The Brilliance H3 sedan is a compact car produced by Brilliance Auto aimed to replace the Brilliance H330 series. Overview The engine options for the Brilliance H3 includes a 1.5 liter engine producing 112 horsepower and a 1.5 liter turbo prod ...
, a Chinese compact sedan *
Haval H3 The Great Wall Haval H3 (), also known as the Great Wall Hover, is a compact sport utility vehicle (SUV) produced by the Chinese manufacturer Great Wall Motors from April 2005 to 2012. It was the first Chinese car to be exported in large quantiti ...
, a Chinese compact SUV *
Huansu H3 The Huansu H3 is a 7-seat MPV produced by Huansu, a brand of the Chonqing Bisu Automotive Corporation, which is closely related to Beiqi-Yinxiang, a joint venture between Beijing Auto (Beiqi) and the Yinxiang Group The Yinxiang Group (银翔 ...
, a Chinese compact MPV *
Hummer H3 The Hummer H3 is an off-road vehicle that was produced from 2005 to 2010 by General Motors. The smallest model of the Hummer lineup, it was offered as a 5-door SUV or a 4-door pickup truck known as the H3T. Unlike the larger H1 and H2 models, t ...
, an American mid-size SUV


Ships

* USS ''H-3'' (SS-30), a 1914 United States Navy H-class submarine * HMS ''Grenville'' (H03), a 1935 British Royal Navy destroyer * HMS ''H3'', a 1915 British Royal Navy H-class submarine


Rail

* H3 series of
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 ...
tramways in Houston


Roads

*
H3 Monks Way The Milton Keynes grid road system is a network of predominantly national speed limit, fully landscaped routes that form the top layer of the street hierarchy for both private and public transport in Milton Keynes, Buckinghamshire. The system is ...
, a road part of the Milton Keynes grid road system, United Kingdom * Interstate H-3, a highway in Hawaii


Other uses

*
H3 (classification) H3 is a para-cycling classification. The UCI recommends this be coded as MH3 or WH3. Definition Union Cycliste Internationale (UCI) defines H3 as: H3.1 (ex-H2.1) * Paraplegic with impairments corresponding to a complete lesion from Th1 to Th3 * ...
, a para-cycling classification * H3, an 18th-century marine chronometer by
John Harrison John Harrison ( – 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea. Harrison's solution revol ...
* H3, a type of automotive halogen lamp *
H3 (pyrotechnics) H3 is a pyrotechnic composition which is used mostly as a burst charge for small diameter shells. It is friction and shock sensitive, as are most compositions containing chlorates. For this reason, H3 should be mixed using the "diaper method" and ...
, a pyrotechnic composition * H3 Hardy Collaboration Architecture, a firm started by
Hugh Hardy Hugh Hardy (July 26, 1932 – March 17, 2017) was an American architect, known for designing and revitalizing theaters, performing arts venues, public spaces, and cultural facilities across the United States. ''The New Yorker'' writer Brendan ...
*
H3 Pharmaceutical Chemistry The Singapore-Cambridge General Certificate of Education Advanced Level (or Singapore-Cambridge GCE A-Level) is a GCE Advanced Level examination held annually in Singapore and is jointly conducted by the Ministry of Education (MOE), Singapore Examin ...
, an advanced subject for GCE A-level students in Singapore * DSC-H3, a 2008
Sony Cyber-shot Cyber-shot is Sony's line of point-and-shoot digital cameras introduced in 1996. Cyber-shot model names use a DSC prefix, which is an initialism for "Digital Still Camera". Many Cyber-shot models feature Carl Zeiss trademarked lenses, while othe ...
camera *
Hash House Harriers The Hash House Harriers (HHH or H3) is an international group of non-competitive running social clubs. An event organized by a club is known as a Hash or Run, or a Hash Run. A common denominal verb for this activity is Hashing, with participan ...
, an international group of non-competitive running, social and drinking clubs *
H3 (Kuwait) H3 (also H3, as-Sabiyah) is an archaeological site in the Subiya Region (Kuwait) that was occupied during the second half of the sixth millennium BC. It was a cultural borderland between Neolithic Arabia and Mesopotamia. Among the finds at the s ...
, an archaeological site


See also

* 3H (disambiguation) * HHH (disambiguation) * Triple H (disambiguation) {{Letter-Number Combination Disambiguation