Toshiba Portege 2010 User Manual page 199

kilobyte (KB): A unit of data storage
equal to 1024 bytes. See also byte
and megabyte.
L
.
level 2 cache: See cache.
Light Emitting Diode (LED): A
semiconductor device that emits light
when a current is applied.
Liquid Crystal Display (LCD): Liquid
crystal sealed between two sheets of
glass coated with transparent con-
ducting material. The viewing-side
coating is etched into character
forming segments with leads that
extend to the edge of the glass.
Applying a voltage between the glass
sheets darkens the liquid crystal to
provide contrast to lighted portions of
the display.
LSI: Large Scale Integration. 1) A
technology that allows the inclusion of
up to 100,000 simple logic gates on a
single chip. 2) An integrated circuit
that uses the large scale integration.
M
main board: See motherboard.
megabyte (MB): A unit of data
storage equal to 1024 kilobytes. See
also kilobyte.
megahertz: A unit of wave frequency
that equals 1 million cycles per
second. See also hertz.
menu: A software interface that
displays a list of options on the
screen. Also called a screen.
microprocessor: A hardware compo-
nent contained in a single integrated
circuit that carries out instructions.
Also called the central processing unit
(CPU), one of the main parts of the
computer.
mode: A method of operation, for
example, the boot mode or the resume
mode.
modem: Derived from modulator/
demodulator, a device that converts
(modulates) digital data for transmis-
sion over telephone lines and then
converts modulated data (demodu-
lates) to digital format where received.
monitor: A device that uses rows and
columns of pixels to display alphanu-
meric characters or graphic images.
See CRT.
monitor
Glossary-9