H4
From Wikipedia, the free encyclopedia
H4 or H-4 can mean:
- For the 18th century chronometer, see John Harrison.
- For the engine configuration, see flat-4.
- A dual-filament headlight bulb for automobiles
- Harrison Number Four, an 18th century chronometer designed by John Harrison
- Histone H4, a component of DNA higher structure in eukaryotic cells
- The proposed SUV Hummer H4
- H-4 visa commonly known as H4 visa, status granted to the immediate family members (spouse and children under 21) of the H-1B visa holders
- The Hughes H-4 Hercules (Spruce Goose) aircraft
- Héli Sécurité Helicopter Airlines and Inter Islands Airlines IATA airline designators
- British NVC community H4, Ulex gallii - Agrostis curtisii heath
