NATIONAL BARCODE DAYNational Barcode Day commemorates more than 40 years of efficiency and accuracy that began on June 26, 1974, when a clerk scanned a 10-pack of Wrigley’s Juicy Fruit gum at a Marsh supermarket in Troy, OH. On that day, the barcode system invented by George Lauer, an IBM engineer, began to change the world. And it has many varieties of barcodes which upgrade universal themes ,it's a way of showing standardized ,data and values information about the things .