DTR.
In
the IBM Personal Computer,
data
terminal ready.
Associated with modem control.
dual in-line package (DIP). A widely used container for an
integrated circuit. DIPs have pins in two parallel rows. The pins
are.
spaced
1/10
inch apart. See also DIP switch.
duplex. (1)
In
data
communication, pertaining to a simultaneous
two-way independent transmission in
both
directions.
(2)
Contrast
with half-duplex.
duty cycle.
In
the operation of a device, the ratio of
on
time
to
idle time.
Duty
cycle
is
expressed as a decimal
or
percentage.
dynamic memory.
RAM
using transistors and capacitors as the
memory elements. This memory requires a refresh (recharge)
cycle every few milliseconds. Contrast with static memory.
EBCDIC.
Extended
binary-coded decimal interchange code.
ECC.
Error
checking
and
correction.
edge connector. A terminal block with a number of contacts
attached to the edge of a printed-circuit
board
to facilitate
plugging into a foundation circuit.
EIA. Electronic Industries Association.
electromagnet.
Any
device
that
exhibits magnetism only while an
electric current flows through it.
enable.
To
initiate the operation of a circuit
or
device.
end of block (EOB). A code
that
marks the end of a block
of
data.
end of file (EOF).
An
internal label, immediately following the
last record of a file, signaling the
end
of
that
file.
It
may include
control totals for comparison with counts accumulated during
processing.
end-of-text
(ETX). A transmission control character used to
terminate text.
Glossary-12
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