Dell Latitude D820 Technical Manual page 116

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. See Mobile Broadband network.
WXGA — wide-aspect extended graphics array — A video standard for video cards and controllers
that supports resolutions up to 1280 x 800."
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.