Dell Dimension C521 Owner's Manual page 136

W
W — watt — The measurement of electrical power. One
W is 1 ampere of current flowing at 1 volt.
WHr — 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.
WLAN — wireless local area network. A series of
interconnected computers that communicate with each
other over the air waves using access points or wireless
routers to provide Internet access.
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.
WWAN — wireless wide area network. A wireless high-
speed data network using cellular technology and covering
a much larger geographic area than WLAN.
WXGA — wide-aspect extended graphics array — A video
standard for video cards and controllers that supports
resolutions up to 1280 x 800.
136
Glossary
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.
Zip — 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.
Zip 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.