Users Guide

Glossary 141
UPS
Abbreviation for uninterruptible power supply. A
battery-powered unit that automatically supplies
power to your system in the event of an
electrical failure.
URL
Abbreviation for Uniform Resource Locator (formerly
Universal Resource Locator).
USB
Abbreviation for Universal Serial Bus. A USB connector
provides a single connection point for multiple
USB-compliant devices, such as mice, keyboards,
printers, and computer speakers. USB devices can also
be connected and disconnected while the system
is running.
utility
A program used to manage system resources—
memory, disk drives, or printers, for example.
utility partition
A bootable partition on the hard drive that provides
utilities and diagnostics for your hardware and
software. When activated, the partition boots and
provides an executable environment for the
partition's utilities.
UTP
Abbreviation for unshielded twisted pair.
UUID
Abbreviation for Universal Unique Identification.
V
Abbreviation for volt(s).
VAC
Abbreviation for volt(s) alternating current.
varbind
An algorithm used to assign an object identifier (OID).
The varbind gives rules for arriving at the decimal prefix
that uniquely identifies an enterprise, as well as the
formula for specifying a unique identifier for the
objects defined in that enterprise's MIB.
variable
A component of a managed object. A temperature
probe, for example, has a variable to describe its
capabilities, its health or status, and certain indexes
that you can use to help you in locating the right
temperature probe.
VCCI
Abbreviation for Voluntary Control Council
for Interference.
VDC
Abbreviation for volt(s) direct current.
VESA
Acronym for Video Electronics Standards Association.
VGA
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 resolution,
you must install the appropriate video drivers and your
monitor must support the resolution. Similarly, the
number of colors that a program can display depends
on the capabilities of the monitor, the video driver, and
the amount of video memory installed for the
video adapter.
VGA feature connector
On some systems with a built-in VGA video adapter, a
VGA feature connector allows you to add an
enhancement adapter, such as a video accelerator, to
your system. A VGA feature connector can also be
called a VGA pass-through connector.