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A storage device is the computer hardware that records and/or retrieves items to and from storage media.

An Input Device is any hardware component that allows you to enter data and instructions into a computer

Output devices are hardware components that convey information to one or more people.

A device that connects to the system unit and is controlled by the processor in the computer.

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from HowStuffWorks

How Computer Memory Works

Memory consists of electronic components that store instructions.

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