HCD

HCD or hcd may refer to:

Science and technology

 * Hectocandela (hcd), a unit of luminous intensity
 * Higher-energy collisional dissociation, a mass spectrometry technique
 * Highest common divisor
 * Host controller driver, for a Host controller interface (USB, Firewire)
 * Human-centered design

Other uses

 * HC Davos, a Swiss ice hockey club
 * California Department of Housing and Community Development, US