In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. With relation to chemical terminology, aromatic hydrocarbons or arenes, alkanes, alkenes and alkyne-based compounds composed entirely of carbon or...

Hardcore Punk, a music style

Coercivity (H_C)

Hospitality Club, the hospitality exchange network

Aero-Tropics Air Services' IATA airline designator

Homocapsaicin, a capsaicinoid

WWE Hardcore Championship, now defunct title in World Wrestling Entertainment

HyperCard, an ancient Macintosh hypermedia program that has been cloned by several companies.