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Glossary 15
program and leave the TSR program resi-
dent in memory for later use.
TSR programs can sometimes cause
memory conflicts. When troubleshooting,
rule out the possibility of such a conflict
by rebooting your computer without start-
ing any TSR programs.
8/
Abbreviation for Underwriters
Laboratories.
80%
Abbreviation for upper memory blocks.
XSSHUPHPRU\DUHD
The 384 KB of RAM located between
640 KB and 1 MB. If the computer has an
Intel386 or higher microprocessor, a utility
called a
memory manager
can create
UMBs in the upper memory area, in which
you can load device drivers and memory-
resident programs.
836
Abbreviation for uninterruptible power
supply. A battery-powered unit that auto-
matically supplies power to your
computer in the event of an electrical
failure.
86%
Abbreviation for Universal Serial Bus. A
USB connector provides a single connec-
tion point for multiple USB-compliant
devices, such as mice, keyboards, print-
ers, and computer speakers. USB devices
can also be connected and disconnected
while the system is running.
XWLOLW\
A program used to manage system re-
sources—memory, disk drives, or
printers, for example.
873
Abbreviation for unshielded twisted pair.
9
Abbreviation for volt(s).
9$&
Abbreviation for volt(s) alternating
current.
9&&,
Abbreviation for Voluntary Control Council
for Interference.
9&5
Abbreviation for video cassette recorder.
9'&
Abbreviation for volt(s) direct current.
9(6$
Acronym for Video Electronics Standards
Association.
9*$
Abbreviation for video graphics array. VGA
and SVGA are video standards for video
adapters with greater resolution and color
display capabilities than previous
standards.
To display a program at a specific resolu-
tion, you must install the appropriate
video drivers and your monitor must sup-
port the resolution. Similarly, the number
of colors that a program can display de-
pends on the capabilities of the monitor,
the video driver, and the amount of video
memory installed for the video adapter.
9*$IHDWXUHFRQQHFWRU
On some systems with a built-in VGA
video adapter, a VGA feature connector
allows you to add an enhancement adapt-
er, such as a video accelerator, to your
computer. A VGA feature connector can
also be called a
VGA pass-through
connector
.
YLGHRDGDSWHU
The logical circuitry that provides—in
combination with the monitor—your com-
puter’s video capabilities. A video adapter
may support more or fewer features than
a specific monitor offers. Typically, a video
adapter comes with video drivers for dis-
playing popular application programs and
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