Above is an example of a QR Code.
When this image is scanned from a barcode reader on a mobile device, the user will be taken directly to this webpage.
"A QR code (abbreviation for Quick Response code) is a specific matrix barcode (or two-dimensional code) that is readable by dedicated QR barcode readers and camera telephones. The code consists of black modules arranged in a square pattern on a white background. The information encoded may be text, URL, or other data."
Source: Wikipedia: The free encyclopedia. (2011, June 12). FL: Wikimedia Foundation, Inc. Retrieved June 13, 2011, from http://en.wikipedia.org/wiki/Qr_code.
To scan a QR Code, you will need the following:
After you have the appropriate items: