There aren't many things at which humans can still outpace computers, but separating cats from dogs is one of them. Microsoft researchers take advantage of that in Asirra, a technology for ensuring that a Web site visitor is indeed a human. To get its library of images, Microsoft has partnered with Petfinder.com, which aims to place pets with willing homes.
March 7, 2007 2:25 PM PST
Photo by: Microsoft
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