Application markup allows you to provide Google with information about the software applications discussed on your site. Information about operating system requirements, category, price and more may be used in search results to help users more quickly and accurately identify relevant content. Visit Webmaster Tools Help (http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=1645432) for more details.
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How can we join the Software Apps Rich Snippets pilot group ?