Cloud computing

A style of computing where massively scalable IT- enabled capabilities are delivered ‘as a service’ to external customers using Internet technologies


Another Step in the Evolution of Technology From in-house to outsourced
Step 1: Outsourcing Outsourcing is great for processes that are standardized and repetitious.
Step 2: Outsourced Hosting Only the technology and infrastructure –but companies still have to buy a fixed amount of computer capacity and run dedicated computers and software. It’s a lot like in-house computing except for the location of the equipment.
Step 3: Software as a Service (SaaS) Share hosted computing resources with other companies, with each company’s data secured separately.
Step 4: Cloud Computing How is cloud computing different from SaaS? The difference is in the back room where the computers reside. Cloud computing distributes the computer capacity across multiple computers that may be in multiple locations.


http://en.wikipedia.org/wiki/Cloud_computing