Cloud computing

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http://www.infoworld.com/d/cloud-computing/cloud-versus-cloud-guided-tour-amazon-google-appnexus-and-gogrid-122

http://programmers.stackexchange.com/questions/64727/windows-azure-vs-amazon-ec2-vs-google-app-engine

Apache cloud computing edition
http://svn.apache.org/repos/asf/labs/clouds/apache_cloud_computing_edition.pdf

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