// Workers AI · dad joke modeIs H1 having an identity crisis? Because it's a header in a bad state.

H1, H-1, H01, H I may refer to:

Transportation, places, sports, and astronomy

Roads, automotive, and biking

• Interstate H-1, a highway in Hawaii
• H1 Lamp, an automotive halogen light bulb
• Haval H1, a Chinese subcompact crossover
• Hummer H1, an American full-size SUV
• Hyundai H-1, a South Korean commercial van
• Tiger H1, a German heavy tank used during WW2
• Kawasaki H1 Mach III, road motorcycle
• Kawasaki H1R, racing motorcycle
• H1 (classification), a para-cycling classification

Water sports and vehicles

• H1 Unlimited, a premier unlimited hydroplane racing league
• HMS H1, a 1915 British Royal Navy H-class submarine
• HMS Hotspur (H01), a 1935 British Royal Navy H-class destroyer
• USS H-1, a 1913 United States Navy submarine

Rail

• Ceylon Government Railway H1, a class of steam locomotives
• 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

Aviation

• Bell Huey family Bell H-1, series of helicopters with that designation
• Hooters Air airline
• Hughes H-1 Racer, a racing aircraft

Space exploration

• H I region, a cloud in the interstellar medium
• H-I or H–1, a Japanese rocket
• Rocketdyne H-1, a liquid-propellant rocket engine
• Tianwen-1 (formerly Huoxing-1), first Chinese space probe to reach Mars

Other places

• Area H1, the area of Hebron controlled by the Palestinian Authority under the Hebron Protocol

Computing and electronics

• <h1></h1>, level 1 heading markup for HTML Web pages; see HTML element
• Unitree H1, a humanoid robot developed by Unitree Robotics
• DSC-H1, a Sony Cybershot digital camera

Science

• Alternative hypothesis (H₁)

Biology and medicine

• British NVC community H1, a heath zone
• Histamine H1 receptor
• Histone H1, a protein
• Haplogroup H1 (disambiguation), a grouping in genetics based on certain similarities
• ATC code H01 Pituitary and hypothalamic hormones and analogues, a subgroup of the Anatomical Therapeutic Chemical Classification System

Chemistry and physics

• Hydrogen atom (H₁)
• Protium (isotope), an isotope of hydrogen
• H-1NF, the Australian Plasma Fusion Research Facility, formerly H-1 Heliac stellarator
• H1 (particle detector)

Time and date

• H1, John Harrison's first marine chronometer
• H1 may refer to the first half of the business year, while H2 refers to the second half.

Other uses

• *h₁, one of the three laryngeals in the reconstructed Proto-Indo-European language
• Hora Um da Notícia, a news program aired by Rede Globo

See also

• Hello Internet (HI), a podcast
• H-1B visa
• HI (disambiguation)
• HL (disambiguation)
• 1H (disambiguation)
• H (disambiguation)
• 1 (disambiguation)
• All pages with titles containing H-1
• All pages with titles beginning with H1
• All pages with titles containing H1