Glossary 9
peripheral
Input or output device not under direct computer control. A printer
is a peripheral device.
pixels
Picture elements. Tiny dots that make up a screen image.
port
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.
Q
QWERTY
The QWERTY keyboard, designed in the 1800s for mechanical
typewriters, refers to the first six keys (QWERTY) on the top row
of letters on the standard keyboard.
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.
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