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Glossary 13
port
Any connection by which data can enter or leave a computer or peripheral.
Provides the means for an interface between the microprocessor 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. On the system board, RAM is
semiconductor-based memory that can be read and written to by the microprocessor
or other hardware devices. In RAM, data can be directly and randomly read or
written (with any choice for the address). It’s the storage location for data that
needs to be immediately available for every application in use on your computer.
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. Resolution is usually specified in pixels by scan
lines, for example, 640 by 480. See pixels.
RS-232C
Standard interface for serial devices.
S
SEC
Single-Edge Contact. The SEC cartridge containing the Pentium processor. See
Slot 1.
serial interface
An interface that communicates information one bit at a time.