Glossary 9
D
default
The system’s factory setting for a specific device feature or system
function. A setting that a computer uses if it has not been modified by
a user.
DIMM
Dual Inline Memory Module. Circuit board with pins connecting to
different memory chips on both sides of the board, which allows for
wider and faster data transfer (128-bit). See SIMMs.
DMA
Direct Memory Access. A method for transferring data, usually
between memory and a disk drive, without going through the CPU.
DMI
Desktop Management Interface. A standard for PCs that allows
manipulation of PC components over a network from a centralized
location.
DRAM
Dynamic Random Access Memory. Memory used to store data in
most computers. DRAM is temporary and must be continually
refreshed. It is only active when the computer is turned on.
driver
A software program that enables peripheral devices (for example,
printer, monitor, mouse, CD-ROM drive) to work with computers.
DVD
Digital versatile disc or digital video disc. A type of CD-ROM that
holds a minimum of 4.7 GB, enough for a full-length movie. The
DVD specification supports disks with capacities of from 4.7 GB to
17 GB and access rates of 600 Kbps to 1.3 Mbps. One of the best
features of DVD drives is that they are backward-compatible with
CD-ROM disks. This means that DVD players can play old CD-
ROMs, CD-I disks, and video CDs, as well as new DVD-ROMs.
Newer DVD players can also read CD-R disks. DVD uses MPEG-2
to compress video data. See MPEG.