8th Slide Service Models are the reference models on which the Cloud Computing is based.These can be categorized into three basic service models first is SaaS In a Software as a Service model a pre-made application, along with any required software, operating system, hardware, and network are provided.Basically SaaS model allows to use software applications as a service to end users. PaaS provides the runtime environment for applications, development & deployment tools, etc. which means in PaaS an operating system, hardware, and network are provided, and the customer installs or develops its own software and applications. The IaaS model provides just the hardware and network; the customer installs or develops its own operating systems, software and applications. 10th Slide In PUBLIC CLOUD It allows systems and services to be easily accessible to the general public. Public cloud may be less secure because of its openness, for example, e-mail. In PRIVATE CLOUD It allows systems and services to be accessible within an organization. It offers increased security because of its private nature. In COMMUNITY CLOUD It allows systems and services to be accessible by group of organizations. And The Hybrid Cloud is mixture of public and private cloud. However, the critical activities are performed using private cloud while the non-critical activities are performed using public cloud. I made this for my sweet little angel ^.^