Dell Precision 370 User Manual
Page 180
system memory. The amount of video memory installed primarily influences the number of colors that a program can display.
video mode —
A mode that describes how text and graphics are displayed on a monitor. Graphics-based software, such as
Windows operating systems, displays in video modes that can be defined as x 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.
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.
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.
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.