H5

H5, H05 or H-5 may refer to:

Science

• Influenza A virus subtype H5 (disambiguation), all A type viruses containing H5 type of agglutinin
• Histone H5, a histone similar to Histone H1
• Haplogroup H5 (mtDNA), a genetics subgroup
• ATC code H05 Calcium homeostasis, a subgroup of the Anatomical Therapeutic Chemical Classification System
• British NVC community H5
• Hydrogen-5 (H-5), an isotope of hydrogen
• H05, an ICD-10 code for diseases of the eye and adnexa

Technology

• H5 (chronometer), a 1773 marine chronometer designed by John Harrison
• DSC-H5, a full-featured-camera made by Sony
• H5, a hurricane tie manufactured by Simpson Strong-Tie Co
• .h5, filename extension used in Hierarchical Data Format
• <h5></h5>, level 5 heading markup for HTML web pages
• Abbreviation for HTML5, especially when used to create mobile-centric web applications or webpages, in contrast to mini-apps on platforms such as WeChat

Transportation

• H5 Series Shinkansen, a Japanese Shinkansen high-speed train
• H5 Portway, a road part of the Milton Keynes grid road system, England
• Hola Airlines (IATA code: H5), a former Spanish airline
• Magadan Airlines (IATA code: H5), a former Russian airline

Military

• HMS H5, a 1918 British Royal Navy H-class submarine
• HMS Greyhound (H05), a 1935 British Royal Navy G-class destroyer
• HMS Ithuriel (H05), a 1940 British Royal Navy I-class destroyer
• H-5, a Chinese manufactured variant of the Soviet Ilyushin Il-28 jet bomber
• Sikorsky H-5, a helicopter
• USS H-5 (SS-148), a 1918 United States Navy submarine

Other uses

• H5 (US company), an American electronic discovery company headquartered in San Francisco, California
• H5 (French company), a French video company
• H5 (classification), a para-cycling classification

See also

• Hydrogen-5 (⁵H), an unstable isotope of hydrogen
• 5H (disambiguation)