What are QR codes?
A QR code is a 2D black and white barcode which can be used to store text, a web link, contact information and other data. QR codes can be scanned using free applications available for most smart phones. Once the code is scanned, the application either displays the content or, in the case of a web link, takes you to a web page.
QR codes can be printed and reproduced on just about any material and can be sized as required, with the minimum width being around half an inch, d...