The first product to have its barcode scanned was a packet of gum!

The first item sold after being scanned with a UPC barcode was a 10-pack of Wrigley's Juicy Fruit Gum, at a price of 67 cents. The sale occurred at 8:01 a.m. on June 26, 1974 at the Marsh Supermarket in Troy, Ohio. The gum is now on display at the Smithsonian Institution’s National Museum of American History in Washington D.C.