H4

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
The Hughes H-4 Hercules (Spruce Goose) aircraft
Héli Sécurité Helicopter Airlines and Inter Islands Airlines IATA airline designators

This page extends a two-character combination which might be any or all of: an abbreviation, an acronym, an initialism, a word in English, or a word in another language. If an referred you to this page, you may wish to change the link to point directly to the intended article.

From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.