With the ability to upload files securely and access them from anywhere, cloud computing has been positioned as today's ideal IT platform. However this has been claimed before for many different IT architectural approaches, how is cloud different? Is what is being offered now an end point, or just the beginning of an evolution of how cloud is instantiated and used?This book looks at how we have got where we are, what cloud is promising now, and how cloud is likely to evolve and change as the future unfolds. Readers will be better able to ensure that decisions made now will hold them in good stead for the future, and they will have a better understanding of how to use cloud to deliver the best outcome for their organisations.