1
2
3
4
5
A
B
G
G – 4
G
so that it can be used by the
computer, and that writes
data from the computer’s
memory onto a disk so that it
can be stored.
DOS
From
D
isk
O
perating
S
ys-
tem. A specialized, disk-ori-
ented program that provides
an easy-to-use link between
the user and a computer’s
disk drive.
DRAM
D
ynamic
RAM
. Storage that
the computer must refresh at
frequent intervals.
Driver
A series of instructions the
computer follows to reformat
data for transfer to and from
a particular peripheral device.
The electrical and mechani-
cal requirements are different
from one kind of device to
another, so software drivers
are used to standardize the
format of data between them
and the central processor.
DVD
From “
D
igital
V
ideo
D
isc”,
later “
D
igital
V
ersatile
D
isc”,
now the acronym is the
name.
A family of double-sided op-
tical discs the same size as
CDs, but with greater capaci-
ties.
DVD-Video uses MPEG-2
compression for about 133
minutes of LaserDisc-quality
video per side. It supports
Dolby Digital surround
sound, with five channels of
CD-quality audio plus a
subwoofer (5.1 channel).
DVD-ROM is for audio,
video, data storage, and in-
teractive material. It can also
play DVD-Video movies.
Glossary:
C
–
D
