Lenovo PC 300GL Understanding Your Personal Computer 6267, 6277, 6287 - Page 66

UART universal asynchronous, receiver/transmitter, universal serial bus USB, utility program, virtual

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U UART (universal asynchronous receiver/transmitter). An electrical circuit that converts analog data to digital data and digital data to analog data; it is used in communications devices. universal serial bus (USB). A serial interface standard for telephony and multimedia connections to personal computers. universal serial bus port. On personal computers, a port that uses a single connector for devices that previously used serial, parallel, keyboard, mouse, and game ports. The USB port connector uses Plug and Play technology to determine what device is connected to the port. A hub device can be used to convert a single USB connector into multiple attachment points. Data is transmitted in asynchronous or isochronous mode. USB. Universal serial bus utility program. (1) A computer program in general support of computer processes; for example, a diagnostic program, a trace program, a sort program. (2) A program designed to perform an everyday task such as copying data from one storage device to another. V VGA. Video graphics array. virtual. Pertaining to a functional unit that appears to be real, but whose functions are accomplished by other means. volatile. (1) Pertaining to a storage device whose contents are lost when power is cut off. (2) Contrast with nonvolatile. W wait state. A period during which a microprocessor suspends processing while waiting for a response to a request for an unavailable source. write. To make a permanent or transient recording of data in a storage device or on a data medium. 58

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U
UART (universal asynchronous
receiver/transmitter)
.
An electrical circuit that
converts analog data to digital data and digital data
to analog data; it is used in communications devices.
universal serial bus (USB)
.
A serial interface
standard for telephony and multimedia connections
to personal computers.
universal serial bus port
.
On personal computers,
a port that uses a single connector for devices that
previously used serial, parallel, keyboard, mouse,
and game ports.
The USB port connector uses Plug
and Play technology to determine what device is
connected to the port.
A hub device can be used to
convert a single USB connector into multiple
attachment points.
Data is transmitted in
asynchronous or isochronous mode.
USB
.
Universal serial bus
utility program
.
(1)
A computer program in
general support of computer processes; for example,
a diagnostic program, a trace program, a sort
program.
(2)
A program designed to perform an
everyday task such as copying data from one
storage device to another.
V
VGA
.
Video graphics array.
virtual
.
Pertaining to a functional unit that appears
to be real, but whose functions are accomplished by
other means.
volatile
.
(1)
Pertaining to a storage device whose
contents are lost when power is cut off.
(2)
Contrast with nonvolatile.
W
wait state
.
A period during which a microprocessor
suspends processing while waiting for a response to
a request for an unavailable source.
write
.
To make a permanent or transient recording
of data in a storage device or on a data medium.
58