How many types of barcodes and what are they ?

How many types of barcodes and what are they ?
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Answer :

There are two types of barcodes. 1) One -dimensional 2) Two - dimensional. *** One-dimensional barcodes are used in common products such as groceries , pens and electrical appliances. *** Two-dimensional barcodes are similar to one-dimensional barcodes , but it can store more data per unit than one-dimensional. Two-dimensional code is also called EQR - Quick Response Code.
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