Most people couldn't put their finger on exactly what Cloud is, but they don't realize they fail because they don't understand the True Nature of Cloud. A clou

Most people couldn't put their finger on exactly what Cloud is, but they don't realize they fail because they don't understand the True Nature of Cloud. A cloud is not Azure. It is not AWS. It is not Rackspace. A cloud is not definable by what it is, but by what it is not. Asking for a definition of a cloud, is like asking for the definitive IP Address of www.amazon.com. A cloud is a hand-wavy indirection, and abstraction of a compute or storage infrastructure. Each of the products you mentioned are not Cloud. They are manifestations of a cloud. But they are not the Cloud, as they are no longer abstract.