When you go to the store everything is rung up with the use of an electronic scanner, but what is it that is being scanned? Well it is the UPC Code of course. This imprint of bars and numbers can tell a lot of information about a product and helps to make shopping quick.
The use of the bar code as it is known by came about in the 1950's.The first bar code was circular in shape. Over time it moved to a linear shape that we recognize today.
http://inventors.about.com/library/inventors/blbar_code.htm
~Angela
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I still find it amazing that those little bars of different widths are "fingerprints" to that specific product. I would love to know how each register and scanner can process that information. Can you imagine if this didn't exist and the cashier had to manually type in the products and their prices? The lines at the grocery store would be so long and they would have to have police officer stationed at every one because of all the impatient customers!
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