Cloud computing is one of the next significant stage in the Internet’s evolution, providing the means through which everything  from computing power to computing infrastructure, applications, business processes to personal collaboration  can be delivered to you as a service wherever and whenever you need.

The “cloud” in cloud computing can be defined as the set of hardware, networks, storage, services, and interfaces that combine to deliver aspects of computing as a service. Cloud service models are based on three categories; Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Services (SaaS).