Some Examples of most commonly used Input Devices :

1.Mouse:

Mouse is often referred to as a handheld pointing device,Using mouse you can
copy/move/cut files,folder etc as per your needs.

2.Keyboard:

Keyboard Is another input device that sends the data to computer according to the keys pressed by users.

3.Microphone:
The Purpose of Mic is to receive sound from different sources and send it to the system.

4.Scanner:
scanner is used to read or scan a hardcopy of document optically i.e paper form of document/file/image then convert it to digital signal and later store converted file to system.

5.Barcode reader:
Mainly used in shops,supermarkets,stores to read the barcodes stickers on products and update inventory simultaneously.