I bought a small ad for my WordPress for Noobs course (starts next week! Call now! Operators are standing by! Not available in stores!) in the January 2011 issue of the Northfield Entertainment Guide (NEG). See it on page 11.
matrix barcode (or two-dimensional code), readable by QR scanners, mobile phones with a camera, and smartphones. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be text, URL or other data.
QR Codes marry the analog world, especially print, to the digital. (They do work online, too. Try it by pointing your smartphone’s code reader app at the code in this blog post.)
I used the free QR Code generator here to make my code.
Right: A QR Code belt buckle.
How else might QR Codes be used in Northfield?