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-
LINE PRINTER A printer that prints data one line
at a time.
LP TTL-S Low-power transistor-transistor logic-
LRU Line replaceable unit.
LSB Least significant bit.
LSI Large scale integration.
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
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-
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
MICROINSTRUCTION An instruction of a
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-
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
MOS Metal-oxide semiconductor. Describes the
structure in which this electric field is createda
metal gate, an oxide layer, and a semiconductor
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
MTT Magnetic tape transport.