Amazon Web Services and Microsoft's Windows Azure cloud service have become big businesses on their own, and the Google Compute Engine infrastructure will soon be joining the public-cloud marketplace as bigger organizations follow small companies and startups to the public cloud, this analysis notes. As Forrester Research's James Staten wrote in a blog post, "Cloud use is no longer solely hiding in the shadows; IT departments are no longer denying it's happening in their company, and legitimate budgeting around cloud is now taking place."

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