The latest rave is something called quick response (or QR) codes. They are like the UPC barcodes used on products except they are a little more complex. The UPC barcodes are one-dimensional (meaning they can only hold up to 20 numerical digits). A QR code is a two-dimensional matrix barcode that can hold thousands of alphanumeric characters of information.

Click the learn more link below to learn more about QR codes and their uses.