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L550/L550D/L555/L555D
LAN: A group of computers or other devices dispersed over a relatively
Light Emitting Diode (LED): A semiconductor device that emits light when
Liquid Crystal Display (LCD): Liquid crystal sealed between two sheets of
M
main board: See motherboard.
megabyte (MB): A unit of data storage equal to 1024 kilobytes.
megahertz: A unit of wave frequency that equals 1 million cycles per
memory: Typically refers to the computer's main memory, where programs
menu: A software interface that displays a list of options on the screen.
microprocessor: A hardware component contained in a single integrated
mode: A method of operation, for example, the Shut Down Mode, Sleep
modem: Derived from modulator/demodulator, a device that converts
monitor: A device that uses rows and columns of pixels to display
motherboard: A name sometimes used to refer to the main printed circuit
MP3: An audio compression standard that enables high-quality
Glossary-10
limited area and connected by a communications link that enables
any device to interact with any other on the network.
a current is applied.
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 alters the brightness of the liquid crystal.
See also kilobyte.
second. See also hertz.
are run and data is temporarily stored and processed.
Memory can be volatile and hold data temporarily, such as RAM, or
it can be nonvolatile and hold data permanently, such as ROM.
A computer's main memory is RAM. See RAM, ROM.
Also called a screen.
circuit that carries out instructions. Also called the central
processing unit (CPU), one of the main parts of the computer.
Mode or the Hibernation Mode.
(modulates) digital data for transmission over telephone lines and
then converts modulated data (demodulates) to digital format where
received.
alphanumeric characters or graphic images. See also CRT.
board in processing equipment. It usually contains integrated
circuits that perform the processor's basic functions and provides
connectors for adding other boards that perform special functions.
transmission and real-time playback of sound files.
User's Manual
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