 Windows Azure is a cloud computing platform that allows users to run applications and services on a virtualized environment. It provides two different cloud models, platform as a service, pass, and infrastructure as a service, IaaS. Pass enables users to create and deploy applications while IaaS provides users with access to physical resources such as storage, networking, and compute power. The platform is built on top of Microsoft's Windows Azure platform and uses the Windows Azure virtual machine feature to provide users with a virtualized environment. This article was authored by D.M. Rahida.