The phrase cloud computing refers to any software running on infrastructure provided by a The term PaaS stands for Platform as a Service. PaaS is a model that gives you access to hardware infrastructure... such as Azure is a cloud platform by Microsoft that provides you with many different services that you can consume on a..., AWS is an acronym for Amazon Web Services. This is Amazon's cloud computing infrastructure. AWS is similar to Microsoft Azure... or Google Cloud computing platform. When you are no longer maintaining the infrastructure and are using these external providers to provide the infrastructure for your application, you are using cloud computing. Earlier you were using your application on your infrastructure through the Internet or the cloud but it wasn’t strictly known as cloud computing.