H1
H1, H-1, H01, H I and their variations may refer to:
Science
- H1 (particle detector)
- H1, Histamine H1 receptor
- H1, Histone H1, a protein
- H1, British NVC community H1 heath zone
- H1, hydrogen atom
- *h₁, one of the three laryngeals in the reconstructed Proto-Indo-European language
<h1></h1>
, level 1 heading markup for HTML Web pages, see HTML element#heading- H I region
ATC code H01 Pituitary and hypothalamic hormones and analogues, a subgroup of the Anatomical Therapeutic Chemical Classification System statistical category of eyelid inflammations
- DSC-H1 camera
- Haplogroup H1, a grouping in genetics based on certain similarities
Statistics
- H1, denotation for Alternative Hypothesis
Transportation
Aviation
- Bell H-1, two helicopters with that designation
- H1, Hooters Air airline
- Hughes H-1 Racer, a racing aircraft
Motor vehicles
- H1, Hummer H1 Humvee-like vehicle
- Hyundai H-1, group of car models
Roads
- H-1, Interstate H-1, a highway in Hawaii
Ships and maritime
- H1, John Harrison's first marine chronometer
- H1, 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
Trains and rail transport
- LB&SCR H1 class, locomotive
- LNER Class H1, locomotive
- Designation for METRORail Siemens S70 light rail vehicles
Others
- H1 Lamp, automotive halogen light bulb
- H-I rocket, a Japanese rocket
- H-1 (rocket engine)
- H-1 Heliac stellarator, now H-1NF
Internet
Podcasts
- HI as an abbreviation for the Hello Internet podcast.
Others
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