Cloud computing is considered the evolution of a variety of technologies that have come together to change an organizations’ approach for building their IT infrastructure. Actually, there is nothing new in any of the technologies that are used in the cloud computing where most of these technologies have been known for ages. It is all about making them all accessible to the masses under the name of cloud computing. Cloud is not simply the latest term for the Internet, though the Internet is a necessary foundation for the cloud, the cloud is something more than the Internet. The cloud is where you go to use technology when you need it, for as long as you need it. You do not install anything on your desktop, and you do not pay for the technology when you are not using it.
This textbook is intended as a guide for an explanatory course of Cloud Computing for the Graduate and Post Graduate Students of several universities across the world.