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5–32 Learning More About Your Computer
Understanding Computer Terms
track-at-once
A method of writing data to a CD. Each time a track (data or audio) is
completed, the recording laser is stopped, even if another track will be
written immediately afterwards. Link and run blocks are written when
the laser is turned on and off.
U
UDF (Universal Disk Format)
A file system endorsed by OSTA (Optical Storage Technology
Association) for use with packet writing and other recordable optical
disc technologies. Also known as EAN.
upload
To send information to another computer on the Internet.
UPS (Uninterruptible Power Supply)
A device that provides a short-term backup power supply as well as
surge protection. See surge protector.
URL (Uniform Resource Locator)
The address of a Web site, for example, www.compaq.com.
USB port (Universal Serial Bus Port)
A connector for plugging in multiple, ultra-high-speed peripherals.
USB ports are gradually replacing serial and parallel ports and are
eliminating the need for so many connectors and cables. (Multiple
USB peripherals can be linked together in a daisy chain to share the
same port.) Windows 98 included a built-in driver for USB
peripherals. Windows Millennium supports a new USB standard that
is 40 times faster than the previous standard. See serial port and
parallel port. See also peripheral</i></a> and driver.
Usenet (Users’ Network)
A worldwide network of computers set up to transmit messages to
newsgroups. See newsgroups.