Dai Nippon Printing(DNP), the world’s largest printing firm released a free Android app which works with DC Code, which is like popular 2D barcode “QR code” but invisible. The app instruction is like this, (1) download app by searching “QUEMA” on Android Market (2) run the app (3) hold up your Android over the printings… Continue reading DNP Develops DC-Code, Invisible QR-Code Alternative