In this undated photo provided by Coldwell Banker, a real estate sign located in St. Petersburg, Fla., using a Quick Response code, the small square with black dots and lines in the bottom half of the... more 
In this undated photo provided by Coldwell Banker, a real estate sign located in St. Petersburg, Fla., using a Quick Response code, the small square with black dots and lines in the bottom half of the image. Anyone walking or driving by can use a smart phone loaded with a QR code app to scan the box. Their phone will then take them to a Coldwell Banker website with real estate listings and agent profiles.(AP Photo/Coldwell Banker less 
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Associated Press
Mon, Jun 27, 2011 11:13 AM EDT