“Architectural Strategies for Cloud Computing”
Oracle White Paper Explains Basics, Offers Considerations 
This 18-page Oracle White Paper covers the basics of cloud computing all the way through the option of creating a private cloud. Beginning with the evolution of the IT architecture and cloud computing’s primary benefits as well as building blocks, the paper then moves into the different levels and architectures involved. The authors explain the variations in clouds - public, private, and hybrid - with the suggestion that a private version may be the best business and financial choice for larger IT enterprises.