MTU— Magnetic tape unit.
N-FET— N-channel field-effect transistor.
NDRO MEMORY— Nondestructive readout mem-
ory.
NEETS— Navy Electricity and Electronics Training
Series.
NIPS— Naval Intelligence Processing System.
NLQ— Near letter quality.
NMOS— N-channel metal-oxide semiconductor.
NONIMPACT PRINTER— A printing device that
does not mechanically impact the paper.
NONVOLATILE STORAGE— A storage device
whose contents are not lost when power is
removed.
NRZ— Non-return-to-zero recording method.
NRZI— Non-return-to-zero indiscrete.
NTDS— Naval Tactical Data System.
NuBus— Simple 32-bit backplane bus (standard
internal data bus).
O— Operand.
OA— Output acknowledge.
OD— Output data.
ODA— Output data
ODR— Output data
acknowledge.
request.
OFFLINE— Pertaining to the operation of a func-
tional unit when not under the direct control of
a computer.
ONLINE— Pertaining to the operation of a func-
tional unit when under the direct control of a
computer.
OP CODE— Operation code.
OP PROGRAM— Operational program.
OTCIXS— Officer-in-Tactical-Command Information
Exchange System.
OUTPUT DATA— Data being delivered or to be
delivered from a device or from a computer
program.
OUTPUT CHANNEL— A channel for conveying
information from a device or logic element.
P/TP— Power/temperature panel.
PAGE PRINTER— A device that prints a whole page
as an entity.
PARITY CHECK— A check that tests whether the
number of binary ONES in an array of binary
digits is odd or even.
PBI— Pushbutton/indicator.
PC— (1) Personal computer/microcomputer; (2)
Printed circuit.
PCB— Printed circuit board.
PE— Phase encoding.
PEAK VOLTAGE— The maximum value present in
a varying or alternating voltage. This value may
be positive or negative.
PEFT— Peripheral equipment functional test.
PERIPHERAL DEVICE— With respect to a par-
ticular processing unit, any equipment that can
communicate directly with that unit. Synony-
mous with peripheral unit.
PGA— Pin grid array.
PHOTODIODE— A diode that produces current by
absorbing light.
PI— Power interrupt.
PITS— Depressions in a CD-ROM that causes the
laser beam to defuse.
PLCC— Plastic leadless chip carrier.
AI-7
