Whittaker was going to tell you about Domino's Pizza QR codes - but someone else has already blogged about them! Read it here (the blog is called Digital Examples).
What are QR codes? They're a bit like a square version of a barcode. Scan them with your smartphone (android, iPhone, whatever) and they give you more information.
Domino's QR codes take you to a weblink so you can order pizza.
Whittaker can't afford to offer each new student a pizza, but we can still use QR codes to pass on useful info. So watch this space - you never know when a QR code might pop up! And (shhh!) not necessarily inside the library, either.