Platform as a Service

In this model, the cloud provider sets up a platform to develop your application or run your application. For example, AWS provides the relational database service (RDS) service, which is a DBMS service wherein you just need to subscribe the RDS service and dump your database and start using it. You need not worry about infrastructure, OS, and other operational stuff. Platform as a Service (PaaS) services can be accessed using the API too.