**2.2 Platform as a service (PaaS)**

A PaaS is typically is a programming platform for developers. This platform facilitates the ecosystem for the programmers/developers to create, test, run and manage the applications. It thus provides the access to the runtime environment for application development and deployment tools. Here developer does not have any access to underlying layers of OS and Hardware, but simply can run and deploy their own applications. Microsoft Azure, Salesforce and Google App Engine are some of the typical examples of PaaS.
