Question

Input devices usage and examples

Answer 1

with the help of input devices you can give commands to the computer so that it may perform task according to your commands. The basic need of input devices is that without these you cannot operate the computer.
example: keyboard, mouse etc.

hope it helps you.

Answer 2

Answer:

In computing, an input device is a piece of equipment used to provide data and control signals to an information processing system such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, digital cameras, joysticks, and microphones