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6 Glossary
M
megabyte
(MB) 1,048,576 bytes.
memory
Electronic storage area in a computer that retains information and programs. A
computer has two types of memory — read-only memory (ROM) and random access
memory (RAM).
menu
A video display of programs or options.
microprocessor
A semiconductor central processing unit that is the principal component of a
microcomputer. Usually contained on a single chip that includes an arithmetic logic
unit, control logic, and control-memory unit.
MIDI
Musical Instrument Digital Interface. A standard serial bus, digital interface designed to
connect electronic musical devices. MIDI has no innate sound of its own.
mini-PCI
A communications standard that offers smaller size, greater design flexibility, and
reduced cost for mobile platforms.
MIR
Medium Infrared, an infrared technology that sends data at 1.152 Mbit/second
(1,152,000 bits per second).
MMX
A set of 57 multimedia instructions built into Intel’s Pentium microprocessors. MMX-
enabled microprocessors handle many common multimedia operations, such as digital
signal processing (DSP), that are normally handled by a separate sound or video card.
However, only software especially written to call MMX instructions — MMX-enabled
software — can take advantage of the MMX instruction set.
mode
A method of operation; for example, the NEC Versa operates in either normal or
power-saving modes.
modem
MOdulator-DEModulator. A device that links computers over a telephone line.