Coprocessor

An optional integrated circuit (chip) that assists the CPU in performing certain numeric calculations faster. See also 387SX.

Copy-protected program

A type of program that cannot be copied. Some copy-protected programs require you to leave the program diskette in the diskette drive while you are using it. Some also require the computer to be running at low speed instead of high speed.

CPU

Central Processing Unit. The integrated circuit (chip) responsible for integrating program instructions, performing calculations, and controlling all input and output operations.

CPU speed

The speed at which the CPU can execute commands. The ActionNote can run at high or low speed. Also called clock speed, execution speed, or operating speed.

CRT

Cathode Ray Tube. A type of video display, such as a color monitor or a TV screen.

Device driver

See Driver.

DIP switch

Dual In-line Package switch. A small switch on a piece of hardware, such as a printer, that controls a particular function.

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