How does a Barcode Scanner Work?

A barcode scanner is used to read the UPC (Universal Product Code) found on just about everything you purchase, including fruits and vegetables (PLU-Price Look-Up codes). Looking at a barcode on the label, you will see a group of lines and beneath numbers. The numbers you see on the label help identify where the product was manufactured, the size and so on.

The first six numbers identifies the manufacturer, the next five is the item number. When the scanner passes over the code, it reads the bars (lines) the same way we read numbers. The item is matched to ensure the code is correct and the price registered based on the information entered in the main computer.

There are some cell phone applications which enable you to use your phone as a barcode scanner.

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