The document discusses cloud software environments, describing how consumers can deploy applications on infrastructure owned by cloud providers like AWS, Azure, and Google Cloud. It identifies three types of cloud environments: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). The document also lists the four parts of cloud computing as the frontend platform, backend platform, cloud delivery model, and network, and it provides examples of different computing environments including mainframe, client-server, cloud, mobile, grid, and embedded systems.