Concept:The keyboard is a hardware component used to feed information into a computer.
Explanation:The keyboard allows a user to type letters, numbers, and commands.
Any device that sends data or instructions into a computer is called an input device.
Since typing on a keyboard transfers data from the user to the system, it performs the function of input.
It is not used for storing data or displaying output, so the other options do not apply.
Hence, the keyboard is classified as an input device.
Answer:A. an input device