312 Glossary
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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.
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