I'm such a Luddite! I was only vaguely aware of QR codes — Quick Response codes. I had heard of them, and I had seen them, and I knew you could somehow embed information in them. But that was the extent of my knowledge. Well, I finally read up on QR codes, and now I wish that they were ubiquitous. A QR code is a sort of two-dimensional bar code that can embed textual information, a URL, an email address, an SMS message, and other types of information directly into the code. Anyone with a smart phone that has a… Continue reading »