Bar Code Reader is also an input device which reads vertical band of lines known as bar codes (standard codes) and converts them to electrical pulses which are sent to the computer for processing. It helps to identify product quality, model & price.
An input device is the medium through which data and instruction are entered into the computer. They are:
Keyboard is a primary input device which is used for entering data to the computer for processing. The main function of keyboard is to generate the related binary code and send to the computer.