QR codes in libraries

The recent 23 things meeting in Cambridge included a talk about how to use QR codes in libraries. A QR code is a sort of sticker that you can put on a poster or sign (see above) . Students scan it with their mobile technologies and can then read and keep the information that you have attached to the code, for example information.
You create them using QR code generator software, available on the internet, for example http://qrcode.kaywa.com/.