IBM RT PC Options Installation page 247

converts the signal received to data for the
computer.
module. See component.
monochrome display. A display device
that has only one color.
parallel transmission. In data
communication, the simultaneous
transmission of a certain number of
signal elements (bits) constituting the
same telegraph or data signal over a data
circuit. Contrast with serial transmission.
plotter. A printing device externally
attached with cables to the system unit,
used to print two-dimensional graphs and
charts.
plug. A device that connects the wires of
an electrical circuit to an electrical source.
The plug is designed to, be inserted into a
jack. See connector.
port. (1) A part of the system unit
or remote controller to which cables
for external devices (display stations,
terminals, printers) are attached. (2) An
access point for data entry or exit.
printer. A device externally attached
to the system unit, used to print system
output on paper.
problem determination. The process of
identifying why the system is not working.
Often this process identifies programs,
equipment, data communications facilities,
or user errors as the source of the problem.
reinstall. To put back the part that was
removed.
resistor. An electronic circuit element
used to hinder the flow of electric current.
RS-232C. A standard set by the EIA for
communication between computers and
externally attached equipment.
RS-422A. A standard set by the EIA for
communication between computers and
externally attached equipment.
serial transmission. In data
communication, sequential transmission
at successive intervals of signal elements
(bits) constituting the same telegraph or
data signal over a data circuit. Contrast
with parallel transmission.
setup. (1) The process or act of preparing
and adjusting a machine or device for its
assigned work. (2) The way in which the
system unit and the external devices are
arranged.
system. The computer and its associated
devices and programs.
system configuration. A process
specifying the machines, devices, and
programs forming a particular data
processing system.
system unit.. The part of the system that
contains the processing unit, the fixed-
disk drives and disk, and the diskette
drives.
terminal. In data communications, a
device, usually equipped with a keyboard
Glossary X-3