See that? That’s a QR code. You find these things everywhere now; in papers and magazines, on business cards and posters. If you’ve been wondering what the hell’s going on, they’re a similar idea to barcodes. They can contain hidden messages, contact details, dirty limericks – best of all, links to websites.
Scan one with your phone’s camera, and its browser will open the page. (You’ll find a free QR reader for most recent phones here.) The one shown is for this very blog. Now real-world objects like printed pages, even buildings, can have clickable links.
But why stop there? I’m growing a vast privet hedge maze in the shape of this code. Soon you’ll be able to come here by clicking on satellite photographs.