Six Reasons Why You Should Use QR Codes for Your Next Event
From the blog:
For context a QR code is a specific matrix barcode (or two-dimensional code), readable by dedicated QR barcode readers and camera phones. The information encoded can be text, URL (web address) or other data.
For a simple explanation of how the technology works please watch the following video created by my great friend Midori Connolly. Midori also wrote a terrific blog post regarding the subject of QR Codes which is a great read.