Rectangular barcode blocks have been slapped on to products for more than forty years now.In fact, the first barcode was used on a pack of Wrigley’s Juicy Fruit chewing gum in an Ohio store in 1974.

Most of us would have done shopping in malls, shops and like-wise places and at the time of payment at cash counter you must have seen that the salesman had scanned the tag of the product you ...