Software Cloud computing is the use of computing resource (hard ware and)that are delivered as a service over a network (typically the internet ).the name comes from the use of a cloud –shaped symbol as an abstraction from the complex infrastructures it contains in system diagrams .cloud computing entrusts remote service with a users data ,software and computation.Software-as-a-Service (SaaS): A wide range of application services delivered via various business models normally available as public offering. Platform-as-a-Service (PaaS): Application development platforms provides authoring and runtime environment.Infrastructure-as-a-Service (IaaS): Also known as elastic compute clouds, enable virtual hardware for various uses.
