Dell Latitude D630 XFR User Manual page 105

computer through the electrical outlet. Surge protectors do not protect against lightning strikes or against brownouts,
which occur when the voltage drops more than 20 percent below the normal AC-line voltage level. Network connections
cannot be protected by surge protectors. Always disconnect the network cable from the network connector during
electrical storms.
SVGA — Super-Video Graphics Array — A video standard for video cards and controllers. Typical SVGA resolutions are 800
x 600 and 1024 x 768. The number of colors and resolution that a program displays depends on the capabilities of the
monitor, the video controller and its drivers, and the amount of video memory installed in the computer.
S-video TV-out — A connector used to attach a TV or digital audio device to the computer.
SXGA — Super-extended Graphics Array — A video standard for video cards and controllers that supports resolutions up
to 1280 x 1024.
SXGA+ — Super-extended Graphics Array plus — A video standard for video cards and controllers that supports
resolutions up to 1400 x 1050.
system board — The main circuit board in your computer. Also known as the motherboard.
system setup — A utility that serves as an interface between the computer hardware and the operating system. System
setup allows you to configure user selectable options in the BIOS, such as date and time or system password. Unless you
understand what effect the settings have on the computer, do not change the settings for this program.
T
TAPI — Telephony Application Programming Interface — Enables Windows programs to operate with a wide variety of
telephony devices, including voice, data, fax, and video.
text editor — A program used to create and edit files that contain only text; for example, Windows Notepad uses a text
editor. Text editors do not usually provide word wrap or formatting functionality (the option to underline, change fonts,
and so on).
TPM — Trusted Platform Module — A hardware-based security feature that when combined with security software
enhances network and computer security by enabling features such as file and e-mail protection.
travel module — A plastic device designed to fit inside the module bay of a portable computer to reduce the weight of the
computer.
U
UAC — User Account Control— Microsoft Windows Vista™ security feature that, when enabled, provides an added layer of
security between user accounts and access to operating system settings.
UMA — Unified Memory Allocation — System memory dynamically allocated to video.
UPS — Uninterruptible Power Supply — A backup power source used when the electrical power fails or drops to an
unacceptable voltage level. A UPS keeps a computer running for a limited amount of time when there is no electrical
power. UPS systems typically provide surge suppression and may also provide voltage regulation. Small UPS systems
provide battery power for a few minutes to enable you to shut down your computer.
USB — Universal Serial Bus — A hardware interface for a low-speed device such as a USB-compatible keyboard, mouse,
joystick, scanner, set of speakers, printer, broadband devices (DSL and cable modems), imaging devices, or storage
devices. Devices are plugged directly in to a 4-pin socket on your computer or in to a multi-port hub that plugs in to your
computer. USB devices can be connected and disconnected while the computer is turned on, and they can also be daisy-
chained together.
UTP — Unshielded Twisted Pair — Describes a type of cable used in most telephone networks and some computer
networks. Pairs of unshielded wires are twisted to protect against electromagnetic interference, rather than relying on a
metal sheath around each pair of wires to protect against interference.
UXGA — Ultra extended Graphics Array — A video standard for video cards and controllers that supports resolutions up to
1600 x 1200.
V
video controller — The circuitry on a video card or on the system board (in computers with an integrated video controller)
that provides the video capabilities—in combination with the monitor—for your computer.
video memory — Memory that consists of memory chips dedicated to video functions. Video memory is usually faster than
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.