The International Journal of Innovative Research in Computer and Communication Engineering
Cloud computing basically comes to focus on IT, a way to increase scope or add potentiality on the fly without spending in new infrastructure, training new personnel, or licensing new software. It encircles any subscription based or pay-per-use service that, in real time over the Internet, extends its existing capabilities. It is often provided "As a service" over the Internet, typically in the form of Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (Pass), or Software-as-a-Service (SaaS). Microsoft Azure and Google App Engine are the examples of platform as a service.