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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. A
pixel is the smallest spot on the screen that a computer can
address.
plug and play
Refers to the ability of a computer system to automatically
configure expansion boards and other devices. This enables
you to plug in a device and use it, without worrying about
setting DIP switches, jumpers, and other configuration
elements.
port
Any connection by which data can enter or leave a computer or
peripheral. You plug cables into ports. 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.
20 Glossary
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