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A: A bar code are nothing but a series of numbers when it reads those numbers depending on the software and intention it can do all sorts of things.
Barcodes are different width lines that are coded into either numbers or characters. In a database you associate a specific encoded value to an item so that when it is scanned by Point of Sale (POS) scanners, the associated software can automatically change the quantity in the database and do various things like bill a credit card, automatically reorder the item and so forth.
There are different barcode standards and usually the database will also include the standard so that the reader and POS software can work properly.
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Where do you get HTML code reader?
10. hey tag, what's with the code?
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