2. Cloud Computing: Everything is a Service

In cloud computing every computing resources is provided as a service. In practical terms a service enables a user to access a resource or facility. A service may be very general such as railway time table inquiry  or it may more specific such as PNR status checking  

In technical sense, a service enables a user to access a resources - information as in case of railways or money in case of ATM and so on. 

Cloud computing extends the idea of service to all computing resources and provides the user access to them via Internet. 

Figure 2: Cloud Computing: Everything is a service 

Cloud service examples include emails, online docs and others.