Input devices of computer definition can be classified into three categories:

1. Input devices that are used to enter text into the computer,

2. Input devices that are used to enter commands into the computer, and

3. Input devices that are used to enter graphics into the computer.

The most common input device for entering text into a computer is a keyboard. A keyboard is a device that has a number of keys on it. When you press a key on the keyboard, it sends a signal to the computer that tells the computer what to do.

Another common input …