Dell Dimension 3100C - Manual (Page 130)

130 Glossary
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VIRUS — A program that is designed to inconvenience
you or to destroy data stored on your computer. A virus
program moves from one computer to another through an
infected disk, software downloaded from the Internet, or
e-mail attachments. When an infected program starts, its
embedded virus also starts.
A common type of virus is a boot virus, which is stored in
the boot sectors of a floppy disk. If the floppy disk is left in
the drive when the computer is shut down and then
turned on, the computer is infected when it reads the
boot sectors of the floppy disk expecting to find the
operating system. If the computer is infected, the boot
virus may replicate itself onto all the floppy disks that are
read or written in that computer until the virus is
eradicated.
V — volt — The measurement of electric potential or
electromotive force. One V appears across a resistance of
1 ohm when a current of 1 ampere flows through that
resistance.
W
W — watt — The measurement of electrical power. One
W is 1 ampere of current flowing at 1 volt.
WH
R — watt-hour — A unit of measure commonly
used to indicate the approximate capacity of a battery. For
example, a 66-WHr battery can supply 66 W of power for
1 hour or 33 W for 2 hours.
WALLPAPER — The background pattern or picture on
the Windows desktop. Change your wallpaper through
the Windows Control Panel. You can also scan in your
favorite picture and make it wallpaper.
WRITE - PROTECTED — Files or media that cannot be
changed. Use write-protection when you want to protect
data from being changed or destroyed. To write-protect a
3.5-inch floppy disk, slide its write-protect tab to the open
position.
X
XGA — extended graphics array — A video standard for
video cards and controllers that supports resolutions up to
1024 x 768.
Z
ZIF — zero insertion force — A type of socket or
connector that allows a computer chip to be installed or
removed with no stress applied to either the chip or its
socket.
Z
IP — A popular data compression format. Files that
have been compressed with the Zip format are called Zip
files and usually have a filename extension of.zip. A
special kind of zipped file is a self-extracting file, which
has a filename extension of.exe. You can unzip a self-
extracting file by double-clicking it.
Z
IP DRIVE — A high-capacity floppy drive developed
by Iomega Corporation that uses 3.5-inch removable disks
called Zip disks. Zip disks are slightly larger than regular
floppy disks, about twice as thick, and hold up to 100 MB
of data.