Barcode Reader is a machine-readable code in form of a sequence of black and white vertical lines of different width and sizes.
A barcode reader is used to read these codes and record the information.
The recorded information in the bar code reader is shared by computer which is able to understand the information and recognize the meaning by reading thickness and spacing of the bars.
A barcode reader can be hand held or fixed.
You may have seen barcodes on the items like cloth, stationary items, etc. To get the details about its cost, style, department, etc counter manager in shopping complex scans the barcode using hand held barcode reader.