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Glossary
M
main board: See motherboard.
MDA: Monochrome Display Adapter. A video display protocol defined by
megabyte (MB): A unit of data storage equal to 1024 kilobytes. See also
megahertz: A unit of wave frequency that equals 1 million cycles per
menu: A software interface that displays a list of options on the screen.
microprocessor: A hardware component contained in a single integrated
MMX: Refers to microprocessors with additional instructions beyond the
mode: A method of operation, for example, the boot mode or the resume
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
MPEG: Moving picture coding expert group is an industry standard
N
non-system disk: A formatted diskette (floppy disk) you can use to store
nonvolatile memory: Memory, usually read-only (ROM), that is capable of
numeric keypad overlay: A feature that allows you to use certain keys on
Glossary-10
the IBM Monochrome Display Adapter and its associated circuitry
for direct drive TTL displays that supports a monochrome 720x350
text mode.
kilobyte.
second. See also hertz.
Also called a screen.
circuit that carries out instructions. Also called the central processing
unit (CPU), one of the main parts of the computer.
x86 standard. The instructions were developed on the basis of
multimedia code requirements and thus improve the performance of
multimedia applications.
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 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.
Sometimes called a main board.
architecture for compression of video signals.
programs and data but you cannot use to start the computer. See
system disk.
permanently storing information. Turning the computer's power off
does not alter data stored in nonvolatile memory.
the keyboard to perform numeric entry, or to control cursor and page
movement.
User's Manual
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