Abstract
We can assume that a few years ago, "cloud computing" was a vague concept, arguing that in an uncertain future, computing would not require anymore software or hardware facilities to be used locally by the end user. This concept had its place with other futurist concepts, such as the vision of a powerful and central artificial intelligence, or Home automation. Indeed, the term "cloud" has everyone believe in a vague idea, far from our everyday reality. However, this concept is now becoming a reality and fully "cloudy" services are currently being launched by lots of providers. "Cloud computing" is touching a broad range of needs, from personal webmail to centralized CRM devices for companies. Let us study this new evolution of IT and learn a bit more about this concept. What and how- This concept could bring to people and companies a new vision of computing. How it started and how it will change in the near future: "Cloud Computing" cannot be attached to a technology or to a particular device. It is more a concept, which is based to the final user's vision of the service provided. And as a concept, the interpretation of "Cloud Computing" may differ according to specialists and spheres of vision.
