314 GlossaryV — volt — The measurement of electric potential or electromotive force. One Vappears across a resistance of 1 ohm when a current of 1 ampere flows through thatresistance.WW — watt — The measurement of electrical power. One W is 1 ampere of currentflowing at 1 volt.WHr — watt-hour — A unit of measure commonly used to indicate the approximatecapacity of a battery. For example, a 66-WHr battery can supply 66 W of power for 1hour or 33 W for 2 hours.wallpaper — The background pattern or picture on the Windows desktop. Changeyour wallpaper through the Windows Control Panel. You can also scan in your favoritepicture and make it wallpaper.WLAN — wireless local area network. A series of interconnected computers thatcommunicate with each other over the air waves using access points or wireless routersto provide Internet access.write-protected — Files or media that cannot be changed. Use write-protection whenyou want to protect data from being changed or destroyed. To write-protect a 3.5-inchfloppy disk, slide its write-protect tab to the open position.WWAN — wireless wide area network. A wireless high-speed data network usingcellular technology and covering a much larger geographic area than WLAN.WXGA — wide-aspect extended graphics array — A video standard for video cardsand controllers that supports resolutions up to 1280 x 800.XXGA — extended graphics array — A video standard for video cards and controllersthat supports resolutions up to 1024 x 768.ZZIF — zero insertion force — A type of socket or connector that allows a computerchip 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 theZip format are called Zip files and usually have a filename extension of .zip. A specialkind of zipped file is a self-extracting file, which has a filename extension of .exe. Youcan unzip a self-extracting file by double-clicking it.
