I've finally updated to the current century and got myself a smartphone. I always remember messing about with the Library's brand new touchscreen computer and thinking "My god, how COOL is THIS!?" ... and now I have one in my pocket. That's MAD. I quickly discovered what these things are too - these are QR's - Quick Recognition Barcodes. This particular one is coded especially to link into my blog - so if you ever need it and can't be bothered to type it into your phone with that fiddly keypad, use your barcode scanner to "grab" the page.