Question

write a short note on-barcode reader 4 or 5 lines​

Answer 1

Explanation:

A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.

Answer 2

here's the short notes on barcode reader