Print & Mobile Phones: QR Codes, NFC Square Off

QR codes and other 2D scan codes are two-
dimensional barcodes. Using a (free) QR generator, binary information is encoded, resulting in the arrangement of black-and-white squares. The codes can be printed on paper or other printable objects. To trigger the event, the user launches an app, takes a picture of the QR code and the software app decodes the information.