View source for H1

{{Wiktionary|H1}}
'''H1''', '''H-1''', '''H01''', '''H I''' may refer to:
{{TOC right}}

==Places==
<!-- *H01, [[Highway H01 (Ukraine)]] -->
*[[Interstate H-1]], a highway in Hawaii
* Area H1, the area of Hebron controlled by the Palestinian Authority under the [[Protocol Concerning the Redeployment in Hebron|Hebron Protocol]]

==Science==
* [[H1 (particle detector)]]
* [[Histamine H1 receptor]]
* [[Histone H1]], a protein
<!-- *H1, first half of a fiscal year - The article has no mention, so this is just a dict def & not admissible on a Dab-->
<!-- *H1, ''[[Halo: Combat Evolved]]'', a video game created by Bungie, for the Xbox - Not mentioned in article; provide convincing reference for use-->
<!-- *[[H1 (Armenian Public TV)]] - No mention in article, nor hint of why "H1"-->
* [[British NVC community H1]], a heath zone
* [[Hydrogen atom]] (H<sub>1</sub>)
* [[Protium (isotope)]], an isotope of hydrogen
* [[H I region]], a cloud in the interstellar medium
* [[ATC code H01]] ''Pituitary and hypothalamic hormones and analogues'', a subgroup of the Anatomical Therapeutic Chemical Classification System
* [[Haplogroup H1 (disambiguation)]], a grouping in genetics based on certain similarities
* [[Alternative hypothesis]] (H<sub>1</sub>)

==Technology==
* {{tag|h1|content=}}, level 1 heading markup for HTML Web pages; see [[HTML element#heading|HTML element]]
* [[DSC-H1]], a Sony Cybershot digital camera
* H1, [[John Harrison#The first three marine timekeepers|John Harrison's]] first marine chronometer
* [[Tianwen-1]] (formerly ''Huoxing-1''), first Chinese space probe to reach Mars
* [[H-1NF]], the Australian Plasma Fusion Research Facility, formerly H-1 Heliac stellarator

==Transportation==
*[[H1 Lamp]], an automotive halogen light bulb
*[[H-I]] or H–1, a Japanese rocket
*[[Rocketdyne H-1]], a liquid-propellant rocket engine

===Aviation===
*[[Bell Huey family]] Bell H-1, series of helicopters with that designation
*[[Hooters Air]] airline
*[[Hughes H-1 Racer]], a racing aircraft

===Motor vehicles===
* [[Haval H1]], a Chinese subcompact crossover
* [[Hummer H1]], an American full-size SUV
* [[Hyundai Starex|Hyundai H-1]], a South Korean commercial van
*[[Tiger I|Tiger H1]], a German heavy tank used during WW2

===Motorcycles===
*[[Kawasaki H1 Mach III]], road motorcycle
*[[Kawasaki H1R]], racing motorcycle

===Ships===
*[[HMS H1|HMS ''H1'']], a 1915 British Royal Navy H-class submarine
*[[HMS Hotspur (H01)|HMS ''Hotspur'' (H01)]], a 1935 British Royal Navy H-class destroyer
*[[USS H-1 (SS-28)|USS ''H-1'']], a 1913 United States Navy submarine

===Rail===
*[[LB&SCR H1 class]], a class of British steam locomotives
*[[LNER Class H1]], a class of British steam locomotives
*Designation for [[METRORail]] [[Siemens S70]] light rail vehicles
<!-- *[[PRR H1]], locomotive -->
<!-- *[[Saxon X H1]], train -->
<!-- *[[SP&S Class H-1]], locomotive class -->

==Time==
*H1 may refer to the first half of the [[fiscal year|business year]], while H2 refers to the second half.

==Other uses==
* [[H1 (classification)]], a para-cycling classification
* {{lang|ine-x-proto|[[*h1|*h₁]]|proto=no}}, one of the three laryngeals in the reconstructed Proto-Indo-European language
* [[H1 Unlimited]], a premier unlimited hydroplane racing league 
*''[[Hora Um da Notícia]]'', a news program aired by Rede Globo

==See also==
{{canned search|h1|h-1}}
* [[Hello Internet]] (HI), a podcast
* [[H-1B visa]]
* [[HI (disambiguation)]]
* [[HL (disambiguation)]]
* [[1H (disambiguation)]]
* [[H (disambiguation)]]
* [[1 (disambiguation)]]
* {{intitle|H-1}}
* {{srt|1}}

{{Letter-Number Combination Disambiguation}}