These aren't used on products you buy in a store, though, because all the bar code needs to contain for a product sold in the US is a single 12-digit number, called the Universal Product Code (UPC).

Laurer was an electrical engineer with IBM in the early 1970s when he spearheaded the development of the UPC, or bar code, which helped retailers reduce pricing errors and keep track of inventory.

The black bars and 12-digit numbers transformed retail industries around the world. RALEIGH, N.C ... Click the video player above to see Laurer and UPC codes in action.

In recalls, best-by or use-by dates are commonly provided. Even if the affected date has passed, be sure to check your freezer or refrigerator for recalled items. If your potentially impacted product ...