The old guy at the saloon was squinting at the small white label on his crisps packet.
The fellow next to him could see the perplexed look on his face. Knowing a great deal about such things, he explained what it was and why it was on the packet. He said that what he was looking at was a UPC number, which stands for Universal Product Code. He told the man that it is referred to as the GTIN, that being the Global Trade Item Number. He said the number is twelve digits long and is assigned to an item, which makes it a completely unique product. He said these markings can be read by an electronic reader. He said this captures and translates the information by using a computer.
His student, although getting more and more drunk, seemed to be taking it all in.
So, he went on to say that these were first created for grocery shops. It made the checkout process a lot faster. Not only that, the system allowed shop keepers to keep track of their inventory.
With a smile, he said, “As you probably know, because this was so successful, it is now used for just about all other retail products.”
The other, blinked a few times.
The man raised his eyebrows. “Do you understand now?
“What?
“Do you get it, what the barcode is?”
“Sure.” He burped. “Last orders are called at 11:30.”
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