UPC (Universal product codes) are 12 digit numbers used to mark the products of a company. These contain the information such as size, color, manufacturer information and discount etc of a product from a particular company. read more:http://cedcommerce.com/blog/walmart-api-integration/generate-upc-code/
Collector Edition Release Date: 1/1/1995 Product Code: 12701 Barbie® as Dorothy is off to see the wizard! And she's wearing an authentic replica of the dress Dorothy wore in the movie. From her crisp blue gingham jumper and white petticoat all the way down to her magical "ruby" slippers, this Collector Edition doll is sure to make you smile.
Clip: “The very first scanning of the now ubiquitous Universal Product Code (UPC) barcode was on a pack of Wrigley Company chewing gum in June 1974.” Read more here: https://en.wikipedia.org/wiki/Barcode