The numbers on fruit stickers have a secret meaning for shoppers.

Add Yahoo as a preferred source to see more of our stories on Google. An egg carton displaying a sell by date and other numbers printed on the side - JollyPopLA/Shutterstock Somewhere beside or below ...

Product bar codes were originally developed to help with inventory tracking and speed up checkout at grocery stores. The relative speed and ease of use of the bar code system, or Universal Product ...