Toshiba Portege 7140 - Manual (Page 185)

User's Manual Glossary 9
Version
5
Last Saved on 20/12/99 04:11
Portege 7140CT User's Manual – 7140_UK.doc – ENGLISH – Printed on 20/12/99 as IM_714UK
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 conducting 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.
maths co-processor: A circuit built into the processor that is dedicated to
intensive math calculations.
MDA: Monochrome Display Adaptor. A video display protocol defined by
the IBM Monochrome Display Adaptor and its associated circuitry
for direct drive TTL displays that supports a monochrome 720x350
text mode.
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 component 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.
million byte (GB): A unit of data storage equal to 1,000,000 bytes.
MMX: Refers to microprocessors with additional instructions beyond the
x86 standard. The instructions were developed on the basis of
multimedia code requirements and thus improve the performance
of multimedia applications.
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 transmission over telephone lines and
then converts modulated data (demodulates) to digital format
where received.
monitor: A device that uses rows and columns of pixels to display
alphanumeric characters or graphic images. See CRT.