Toshiba Portégé M100 User Manual page 262

megabyte (MB)
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.
Glossary-10
motherboard: A name sometimes used
to refer to the main printed circuit
board in processing equipment. It
usually contains integrated circuits that
perform the processor's basic func-
tions and provides connectors for
adding other boards that perform
special functions. Sometimes called a
main board.
N
non-system disk: A formatted
diskette (floppy disk) you can use to
store programs and data but you
cannot use to start the computer. See
system disk.
nonvolatile memory: Memory,
usually read-only (ROM), that is
capable of permanently storing
information. Turning the computer's
power off does not alter data stored in
nonvolatile memory.
numeric keypad overlay: A feature
that allows you to use certain keys on
the keyboard to perform numeric
entry, or to control cursor and page
movement.
O
OCR: Optical Character Recognition
(reader). A technique or device that
uses laser or visible light to identify
characters and input them into a
storage device.