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Barcode is a method which contains some black and
white lines with variable thickness. You can store stock code,
serial numbers or any other information in a barcode.
Barcode is a reference number. It must contain a number which
points a product. You must get the other information such as
price, name etc for the product by using this reference number.
Barcode must not contain any explanation about the product. This
reference number is stored in computer and other needed data is
got with this reference number from computer.
There are many barcode symbologies in the world. Barcode
symbology determines whether barcode will contain special
character or alpha numeric characters and how the thickness of
the lines will be. Some barcode symbologies contain only numbers
and some contain special characters. So there are many barcode
types in the world but some of them are commonly used. Cod39,
Code93, Upca, ean8, ean13 are used widely.
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