Hard Disk Drive. Although usually associated with computers, Panasonic's top-ranging DVD recorders also feature hard disks. Their enormous capacity can store huge amounts of video and images which can be archived or edited before transferring to a 'soft' disk such as a blank DVD-RAM or DVD-R.
Found on http://www.encyclo.co.uk/local/20171
Hard Disk Drive. A magnetic medium for storing digital information on most computers and electronic equipment that process digital data.
Found on http://www.zoo.co.uk/~z0001325/Glossary.html
Some Oki printer models include a Hard Disk Drive (HDD) which can be used to store fonts, templates, overlays as well as being used to store print jobs.
Found on https://www.encyclo.co.uk/local/20654