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port
Provides the means for an interface between the microproc-
essor and external devices. A cable connector is usually
plugged into the port to attach the device to the computer.
processor
In a computer, a functional unit that interprets and executes
instructions.
prompt
A special symbol indicating the beginning of an input line.
Also a message that appears on the screen indicating that
the user must take a certain action.
R
RAM
Random Access Memory. A storage device into which
data is entered and from which data is retrieved in a
nonsequential manner.
read
To extract data from a storage device such as a diskette.
ROM
Read-Only Memory. Memory in which stored data cannot
be modified by the user except under special conditions.
reset
The process of returning a device to zero or to an initial or
arbitrarily selected condition.
resolution
The degree of screen image clarity. Video display resolution
is determined by the number of pixels on the screen. Reso-
lution is usually specified in pixels by scan lines, for exam-
ple, 640 by 480. See pixels.
Glossary 9
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