Dell Vostro 1400, Руководство пользователя

Страница: 237 / 248

Glossary
237
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.
book.book Page 237 Wednesday, September 16, 2009 11:12 AM