H1

H1, H01 or H-1 may refer to: TOCright
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* Hummer H1, a civilian vehicle based on the Humvee
* the Hydrogen atom
* H1 (particle detector), a particle detector in operation at HERA
* H-1B visa, a US work visa category for non-immigrants
* DSC-H1, a 2005 Sony Cyber-shot H series camera
* Histamine H1 receptor, a histamine receptor
* Histone H1, one of the five main histone proteins
* The IATA airline designator for Hooters Air
* The first half of a business year
* "", a video game created by Bungie, for the Xbox
* The code for 'other inflammation of eyelid'
* H1 (Armenian Public TV), a state-owned and operated public television station in Armenia
* H1 bulbs, a specific type of auto light bulb
* ATC code H01, a section of the Anatomical Therapeutic Chemical Classification System
* British NVC community H1, one of the heath communities in the British National Vegetation Classification system
* H1 or Harrison Number One, the first of a series of 18th-century marine chronometers designed by John Harrison

Transportation

Roads

* Highway H01 (Ukraine), a road in Ukraine
* Interstate H-1, the busiest interstate highway in Hawaii

hips

* HMS "H1", a 1915 British Royal Navy H-class submarine
* HMS "Hotspur" (H01), a 1935 British Royal Navy H-class destroyer
* USS H-1 (SS-28), a 1913 United States Navy submarine

Trains

* LB&SCR H1 class, a British LB&SCR locomotive
* LNER Class H1, a British 4-4-4T steam locomotive model
* PRR H1, an American PRR 2-8-0 steam locomotive
* Saxon X H1, a German train related to the Saxon XII H2
* SP&S Class H-1, a class of steam locomotives

Other

* H-1 (rocket engine), a rocket engine used alone in the first stages of some Thor - Delta rockets and the Jupiter rocket
* H.1, a reconstructed wagon, part of the goods fleet of the Isle of Man Railway
* Bell H-1, an American helicopter
* Hughes H-1 Racer, a racing aircraft built by Howard Hughes' company in 1935
* Hyundai H-1, three South-Korean related car models
* Kawasaki H1 Mach III 500, a 1968 Kawasaki motorcycle model