In this digital word, Barcodes are used everywhere which starts from purchasing goods from any retail store, when attending any major events, when renting of cars, it is even used when going to meet a doctor. We need some technology to read the barcodes. Barcode Scanners do this. It has the capability to read the binary patterns and feed the information to a computer. This article will present you with the detailed information regarding the working and the popularity behind this Barcode Scanners.