A barcode is a graphic that records information about data symbols, which are distributed on a plane with a specific geometry and according to a certain pattern. In encoding, barcodes cleverly use the concept of "0" and "1" bitstreams that form the basis of the computer's internal logic.

A barcode scanner, also known as a barcode reader, barcode scanner gun, barcode scanner, barcode scanner gun, and barcode reader. It is a reading device used to read the information contained in a barcode.