AWS is not a Platform as a Service (PaaS) provider or Software as a Service (SaaS) provider.
What are these?
A Platform as a Service (PaaS) is a service where you do not manage the underlying infrastructure. An example of this would be Microsoft's Azure framework or Google's App Engine. The benefit of this approach is that you don't have to worry about things such as servers, networks or storage. The downside to this approach is that you have no control over how these services are integrated into your existing infrastructure, and in some cases this isn't even an option.
In this scenario, you would write your application and then deploy it into their controlled environment, letting the PaaS provider manage the underlying infrastructure. ...