Dell Latitude ATG D620 User Manual page 208

Glossary: Dell Latitude ATG D620 User's Guide
horizontal pixels by y vertical pixels by z colors. Character-based software, such as text editors,
displays in video modes that can be defined as x columns by y rows of characters.
video resolution — See resolution.
virus — A program that is designed to inconvenience you or to destroy data stored on your computer.
A virus program moves from one computer to another through an infected disk, software downloaded
from the Internet, or e-mail attachments. When an infected program starts, its embedded virus also
starts.
A common type of virus is a boot virus, which is stored in the boot sectors of a floppy disk. If the
floppy disk is left in the drive when the computer is shut down and then turned on, the computer is
infected when it reads the boot sectors of the floppy disk expecting to find the operating system. If the
computer is infected, the boot virus may replicate itself onto all the floppy disks that are read or
written in that 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.
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.
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.
Wi-Fi Catcher™ Network Locator — An application used in conjunction with the wireless switch on
the side of your computer to scan for WLAN in your vicinity.
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."
file:///H|/My%20Documents/Cellular/User%20Guides/Notebooks/D620%20ATG/glossary.htm (16 of 17)4/13/2007 4:36:53 PM