You’ve probably seen Quick Response (QR) codes like squares with squiggly lines and designs at random places around town. For ex. in coke bottle.
The QR Code system has become popular due to its fast readability and greater storage capacity compared to standard UPC barcodes.
It serves variety of function: Scan them with your smart phone, and they’ll take you to a Web site or phone app, give you coupons and maps to find restaurants or businesses or help you remember to have your car serviced. You can even imprint one on a T-shirt to take the place of business cards. QR codes help draw you to all sorts of places and events.
Lot of free websites available to generate the QR code such as http://www.qrcode-monkey.com/.