This is an image of the first paragraph on QR Codes on Wikipedia embedded in a QR code. I made it using this page: http://qrcode.kaywa.com/
“A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The “QR” is derived from “Quick Response”, as the creator intended the code to allow its contents to be decoded at high speed. QR Codes are common in Japan where they are currently the most popular type of two dimensional code.” – Wikipedia
QR Codes are basically our standard bar codes, but super amp’d up so they can hold a lot more information.