matrix printer. A printer in which each character
is
represented
by
a pattern
of
dots; for example, a stylus printer, a wire printer.
Synonymous with dot printer.
MD. 1,048,576 bytes.
mega (M). Prefix 1,000,000.
megahertz (MHz). 1,000,000 hertz.
memory. Term for main storage.
meter (m). A unit
of
length (equivalent to 39.37 inches).
MFM.
Modified frequency modulation.
MHz.
Megahertz; 1,000,000 hertz.
micro
(J-t).
Prefix 0.000,001.
microcode. (1) One
or
more microinstructions. (2) A code,
representing the instructions
of
an instruction set, implemented in
a
part
of
storage that
is
not program-addressable.
microinstruction. (1)
An
instruction
of
microcode. (2) A basic
or
elementary machine instruction.
microprocessor.
An
integrated circuit that accepts coded
instructions for execution; the instructions may
be
entered,
integrated,
or
stored internally.
microsecond
(J-ts).
0.000,001 second.
milli (m). Prefix 0.001.
milliampere (rnA). 0.001 ampere.
millisecond (ms). 0.001 second.
mnemonic. A symbol chosen to assist the human memory; for
example,
an
abbreviation such as "mpy" for "multiply."
Glossary-21
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