Glossary 199TPM — trusted platform module — A hardware-based security feature that whencombined with security software enhances network and computer security by enablingfeatures such as file and e-mail protection.travel module — A plastic device designed to fit inside the module bay of a portablecomputer to reduce the weight of the computer.UUAC — user account control— Microsoft Windows Vista® security feature that,when enabled, provides an added layer of security between user accounts and access tooperating system settings.UMA — unified memory allocation — System memory dynamically allocated tovideo.UPS — uninterruptible power supply — A backup power source used when theelectrical power fails or drops to an unacceptable voltage level. A UPS keeps acomputer running for a limited amount of time when there is no electrical power. UPSsystems typically provide surge suppression and may also provide voltage regulation.Small UPS systems provide battery power for a few minutes to enable you to shutdown your computer.USB — universal serial bus — A hardware interface for a low-speed device such as aUSB-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-porthub that plugs in to your computer. USB devices can be connected and disconnectedwhile 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 telephonenetworks and some computer networks. Pairs of unshielded wires are twisted to protectagainst electromagnetic interference, rather than relying on a metal sheath aroundeach pair of wires to protect against interference.UXGA — ultra extended graphics array — A video standard for video cards andcontrollers that supports resolutions up to 1600 x 1200.Vvideo controller — The circuitry on a video card or on the system board (in computerswith an integrated video controller) that provides the video capabilities—incombination with the monitor—for your computer.
