Table of Contents
Advertisement
U
Uninterruptible Power Supply (UPS): A device connected between a
piece of electrical equipment, such as a computer system, and the
AC power source to protect against transient power conditions and
short-term power outages. A UPS unit contains a power-level
sensor and a battery. If the sensor detects a loss of power, it switches
over to the battery giving you time to save data and close down the
system.
upload: To send a file to another computer through a modem. See also
download.
utility: A computer program that lets you modify how certain aspects of
your computer function. Utilities differ from applications because
you don't use them to do real work—they just make your life easier.
Different utilities manage fonts, compress files, and check for
viruses.
V
volatile memory: Random Access Memory (RAM) that is capable of
storing information only while the computer is on.
W
Wake on LAN (WOL): The Wake on LAN function turns on the server
when the client PC sends the necessary code. It is a trademarked
technology of IBM Corporation.
warm boot: Restarting the computer without turning it off. See also boot,
restart.
.wav file: Digital audio uses computer-based technology to record,
handle, and recreate sound. Digital audio systems sample the
waveform at fixed time intervals and reduce the sound to a sequence
of numbers. When you play back a digital waveform or .wav file,
the software transforms the numeric data back into its original
acoustic waveform.
window: A portion of the screen that can display its own application or
document.
wizard: A helpful online tutor that guides you through common
procedures or processes, as in hardware wizard.
World Wide Web: The international network of home pages linked
together over the Internet by hypertext jumps. A user of the WWW
can jump from page to page regardless of the location of each page.
203
Glossary
Advertisement
Table of Contents
