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G – 16
G
Glossary:
W
–
Z
U - V
USB
(
U
niversal
S
erial
B
us) A
hardware interface for low-
speed peripherals such as the
keyboard, mouse, joystick,
scanner, printer and tele-
phony devices. It supports
MPEG-1 and MPEG-2 digital
video. It has a maximum
bandwidth of 1.5 Mbytes/sec,
and support up to 127 de-
vices. USB peripherals are
“hot” swappable.
Utility
A program that helps the user
run, enhance, create, or ana-
lyze other programs, pro-
gramming languages, operat-
ing systems, and equipment.
Utilities are designed to facili-
tate or aid the operation and
use of the computer for a
number of different applica-
tions and uses.
V.90
An ITU standard for a mo-
dem that communicates at
56 Kbps downstream and
33.6 Kbps upstream.
VGA
V
ideo
G
raphics
A
dapter.
Video system that allows si-
multaneous display of 256
colors at 640 x 480 graphics
resolution and 720 x 400 text
resolution.
This standard has been su-
perceded by SVGA (800 x
600 resolution), XVGA
(1024 x 768 resolution) and
SXVGA (1280 x 1024 reso-
lution)
Volatile memory
The contents of the memory
storage unit are lost when
the machine is turned off
(e.g. cache or RAM).
