H1

H1 or H-1 can mean:

H1 is a short form for "Heinz"
H1 (particle detector)
H1 is the largest and most important HTML header element
H1 is a class of histone that seals off a nucleosome and allows histone-DNA-complexes to form a 30-nm fiber, the second level on chromatin organization.
H-1 rocket engine
Interstate H-1, a United States Interstate Highway in the state of Hawaii
Harrison Number One, an eighteenth century chronometer designed by John Harrison
Histone H1, a component of DNA higher structure in eukaryotic cells
Hooters Air IATA code
Hummer H1 automobile
H1 is a type of light bulb used frequently in automotive lighting applications

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