Dell Precision T7400 User's Guide - Page 306

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. 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. 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. 306 Glossary