TECHNOLOGY-TO-THE-POINT (T3P)

  What is SaaS (Software as a Service)? Software as a service (SaaS)   allows users to connect to and use cloud-based apps over the Internet. Common examples are email, calendaring, and office tools (such as Microsoft Office 365).

  What is PaaS (Platform as a Service)? Platform as a service (PaaS)   allows you to avoid the expense and complexity of buying and managing underlying application infrastructure. You manage the applications and services you develop, and the cloud service provider typically manages everything else.

  What is IaaS (Infrastructure as a Service)? Infrastructure as a service (IaaS)   is an instant computing infrastructure, provisioned, and managed over the internet. IaaS quickly scales up and down with demand, letting you pay only for what you use.

Overview Cloud computing is an approach through which everything related to computing (Servers, network, storage, applications, platform etc.) offered "as a service". "As a Service" means you will not own the Infrastructure rather than use it and will pay as per usage.