Glossary 311
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.
W
ALLPAPER — 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.
W
RITE-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.
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 they hold up to 100 MB of data.
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