# H3

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> Markdown URL: https://mediated.wiki/source/H3.md
> Source: https://en.wikipedia.org/wiki/H3
> Source revision: 1309137388
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**H3**, **H03** or **H-3** may refer to:

## Entertainment

- [*H3* (film)](/source/H3_(film)), a 2001 film about the 1981 Irish hunger strike
- *[H3 – Halloween Horror Hostel](/source/H3_%E2%80%93_Halloween_Horror_Hostel)*, a 2008 German horror-parody television film
- *[Happy Hustle High](/source/Happy_Hustle_High)*, a manga series by Rie Takada, originally titled "H3 School!"
- [h3h3Productions](/source/H3h3Productions), styled "[h3]", a satirical YouTube channel

## Science

- [Triatomic hydrogen](/source/Triatomic_hydrogen) (H3), an unstable molecule
- [Trihydrogen cation](/source/Trihydrogen_cation) (H3+), one of the most abundant ions in the universe
- [Tritium](/source/Tritium) (3H), or hydrogen-3, an isotope of hydrogen
- [ATC code H03](/source/ATC_code_H03) *Thyroid therapy*, a subgroup of the Anatomical Therapeutic Chemical Classification System
- [British NVC community H3](/source/British_NVC_community_H3), a heath community of the British National Vegetation Classification system
- [Histamine H3 receptor](/source/Histamine_H3_receptor), a human gene
- [Histone H3](/source/Histone_H3), a component of DNA higher structure in eukaryotic cells
- [Hekla 3 eruption](/source/Hekla_3_eruption), a huge volcanic eruption around 1000 BC

## Computing

- [HTTP/3](/source/HTTP/3), the third major version of the Hypertext Transfer Protocol
- [Socket H3](/source/Socket_H3), a CPU socket
- , the level-3 [HTML heading markup element](/source/HTML_element#heading)
- H3, a geospatial indexing system based on a [discrete global grid](/source/Discrete_global_grid), developed by [Uber](/source/Uber)

## Transportation

### Air and space

- [H3 (rocket)](/source/H3_(rocket)), a Japanese expendable launch system
- [H-3 Air Base](/source/H-3_Air_Base), a former Iraqi Air Force base in western Iraq
- [Dynali H3 EasyFlyer](/source/Dynali_H3_EasyFlyer), a Belgian helicopter
- [Howland H-3 Pegasus](/source/Howland_H-3_Pegasus), an American ultralight aircraft
- [Sikorsky SH-3 Sea King](/source/Sikorsky_SH-3_Sea_King), an American twin-engined anti-submarine warfare helicopter
- [Standard H-3](/source/Standard_H-3), an early American reconnaissance aircraft
- [VFW-Fokker H3 Sprinter](/source/VFW-Fokker_H3_Sprinter), a West German experimental rotorcraft

### Automobiles

- [Brilliance H3](/source/Brilliance_H3), a Chinese compact sedan
- [Great Wall Haval H3](/source/Great_Wall_Haval_H3), a Chinese compact SUV
- [Huansu H3](/source/Huansu_H3), a Chinese compact MPV
- [Hummer H3](/source/Hummer_H3), an American mid-size SUV
- [IFA Horch H3](/source/IFA_Horch_H3), an East German lorry
- [Rely H3](/source/Rely_H3), a Chinese light commercial van

### Rail

- [Alstom Prima H3](/source/Alstom_Prima_H3), a French diesel/battery hybrid locomotive
- [GNR Class H3](/source/GNR_Class_H3), a class of British steam locomotives
- H3 series of [METRORail](/source/METRORail#H3_series) tramways in Houston

### Roads

- [H3 Monks Way](/source/H3_Monks_Way), part of the Milton Keynes grid road system, United Kingdom
- [Interstate H-3](/source/Interstate_H-3), a highway in Hawaii

### Ships

- [*H3* (yacht)](/source/H3_(yacht)), a luxury yacht
- [HMS *Grenville* (H03)](/source/HMS_Grenville_(H03)), a destroyer of the British Royal Navy
- [HMS *H3*](/source/HMS_H3), a submarine of the British Royal Navy
- [USS *H-3* (SS-30)](/source/USS_H-3_(SS-30)), a submarine of the United States Navy

## Other uses

- [H3 (classification)](/source/H3_(classification)), a para-cycling classification
- [H3 (Kuwait)](/source/H3_(Kuwait)), an archaeological site
- [H3 (pyrotechnics)](/source/H3_(pyrotechnics)), a pyrotechnic composition
- *[*h₃](/source/*h3)*, one of the three laryngeals in the reconstructed Proto-Indo-European language
- [H3 Entertainment](/source/H3_Entertainment), a subsidiary of the film industry company The H Collective
- *[H3 Podcast](/source/H3_Podcast)*, hosted by Ethan Klein
- [Gerovital H3](/source/Gerovital_H3), a pseudoscientific anti-aging treatment
- [Hash House Harriers](/source/Hash_House_Harriers), an international group of non-competitive running, social and drinking clubs
- H3, an 18th-century marine chronometer by [John Harrison](/source/John_Harrison#The_first_three_marine_timekeepers)
- H3, a type of [automotive halogen lamp](/source/List_of_automotive_light_bulb_types)
- H3 Hardy Collaboration Architecture, a firm started by [Hugh Hardy](/source/Hugh_Hardy)
- DSC-H3, a 2008 [Sony Cyber-shot](/source/List_of_Sony_Cyber-shot_cameras#H_series) camera

## See also

- [3H (disambiguation)](/source/3H_(disambiguation))
- [HHH (disambiguation)](/source/HHH_(disambiguation))
- [Triple H (disambiguation)](/source/Triple_H_(disambiguation))

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Adapted from the Wikipedia article [H3](https://en.wikipedia.org/wiki/H3) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/H3?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.