H1
H1, H-1, H01, H I may refer to: == Places == Interstate H-1, a highway in Hawaii Area H1, the area of Hebron controlled by the Palestinian Authority under the Hebron Protocol == Science == H1 (particle detector) Histamine H1 receptor Histone H1, a protein British NVC community H1, a heath zone Hydrogen atom (H1) 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 (H1) == Technology == <h1></h1>, level 1 heading markup for HTML Web pages; see HTML element DSC-H1, a Sony Cybershot digital camera H1, 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 Unitree H1, a humanoid robot developed by Unitree Robotics == 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 H-1, a South Korean commercial van Tiger H1, a German heavy tank used during WW2 === Motorcycles === Kawasaki H1 Mach III, road motorcycle Kawasaki H1R, racing motorcycle === Ships === 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 === 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 == Time == H1 may refer to the first half of the business year, while H2 refers to the second half.