Cloud computing is one of the latest computer and business industry buzz words. It joins the ranks of virtualization, grid computing, and clustering, among others, in the IT industry. The problem is that, depending on your point of view, the definition of cloud computing can be quite different. Depending on your perspective, you could look at it from a business point of view or an application point of view, as well as others. This has created confusion on the definition and a fuzzy view as to what cloud computing is or even does.

This paper will discuss the definition of cloud computing, the public or external cloud, the private or internal cloud, the evolution of cloud computing and more.