LIFO— Last-in, first-out.
LIGHT EMITTING DIODE (LED)— A diode that
emits visible light when it is forward biased.
Lin CMOS— Silicon gate metal-oxide semiconductor
field-effect transistor (Trademark of Texas In-
struments, Inc.).
LINE PRINTER— A printer that prints data one line
at a time.
LP TTL-S— Low-power transistor-transistor logic-
Schottky.
LRU— Line replaceable unit.
LSB— Least significant bit.
LSI— Large scale integration.
M— Megabyte.
MAGNETIC INDUCTION— Generating a voltage in
a circuit by the creation of relative motion
between the magnetic field and the circuit.
MAINTENANCE— Work done to correct, reduce, or
to counteract wear, failure, and damage to
equipment.
MBR— Master boot record.
MC— Master clear.
MDD— Micro disk drive.
MEMORY— Synonym for storage.
MFM— Modified frequency modulation. A system
of encoding data on a magnetic disk.
MICROCONTROLLER— Synonym for microproc-
essor.
MICROELECTRONICS— The solid-state concept of
electronics in which compact semiconductor
materials are designed to function as an entire
circuit or subassembly rather than as circuit
components.
MICROINSTRUCTION— An instruction of a
microprogram.
MICROPROCESSOR— An integrated circuit that
accepts coded instructions at one or more
terminals or ports, executes the instructions
received, and delivers signals describing its
progress. The instructions may be entered,
integrated, or stored internally.
MICROPROGRAM— A sequence of instructions
executed by a microprocessor.
MILITARY STANDARDS (MILSTD)— Standards of
performance for components or equipment that
must be met to be acceptable for military sys-
tems.
MIP— Maintenance index page.
MIPS— Million instructions per second.
MOS ICs— Contain parts comparable to discrete
resistors (NMOS, PMOS, and FETS). Source
acts as the emitter; gate acts as the base; and
the drain acts as the collector. Controlled by
voltage produced on the controlling terminal
(gate).
MOS— Metal-oxide semiconductor. Describes the
structure in which this electric field is created—a
metal gate, an oxide layer, and a semiconductor
channel.
MOSFET— MOS field-effect transistor.
MPC— Microprogrammed controller.
MRC— Maintenance requirement card.
MS-DOS— Microsoft-Disk Operating System.
MSB— Most significant bit.
MSI— Medium-scale integration.
MT— Main timing.
MTIDC— Mass termination insulation displacement
connection.
MTI— Magnetic tape transport.
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