Digital Equipment 300 Series AXP Reference Manual page 281

depth of image
The number of bits per pixel in a frame buffer.
device
The general name for a hardware unit connected to the system
that is capable of receiving, storing, or transmitting data. An
example of a device is a fixed disk drive; you can install a fixed
disk drive into the system unit or into an expansion box that you
then connect to the system unit.
device name
The name by which a device or controller is identified in the
system. The name that a particular operating system uses for a
storage device to access that particular device. Also called the
device mnemonic.
diagnostics
Programs, located in read-only memory, that detect and identify
abnormal system hardware operation.
digital data
Information recorded and transmitted in binary coded form.
direct memory access
A processor that transfers data directly from one memory to
another without going through the main processor.
disc
See compact disc.
disk
A flat circular plate with a magnetic coating on which data is
magnetically stored in concentric circles (tracks). A fixed disk
resides permanently inside a disk drive, whereas a diskette is
removable.
disk drive
A device that holds a disk. The drive contains mechanical
components that spin the disk and move the read and write
heads that store and read the information on the surface of the
disks.
Glossary–9