The document discusses cloud computing and the concept of a "World Wide Cloud" (WWC). It defines cloud as a service model (IaaS, PaaS, SaaS, etc.) and discusses users and producers in the cloud. It then introduces the idea of the WWC architecture, which would allow computing environments and virtual machines to be migrated across multiple clouds without changes, enabling universal cloud computing. Key aspects of the WWC architecture include virtual and hardware-independent elements, separate data/control/encryption paths, and migrate-able virtual computing environments called Migrate-able Domains.