Came across QR Codes, which are a bar-code variant (2 dimensional) that convert to text. I’m seeing them on web pages, and the interest in them comes from a low end camera (think cell phone) being able to see the code and decode it. I used Kaywa software to generate the code, and am using an iPhone app called QRCode to read them. If the code translates to a URL it jumps right to the URL.

Note on the link to the QRCode app.  It’s in German, so I have no idea if that’s really the product link.  Here’s the iTunes store link.