World of Computer Science and Information Technology
Cloud computing basically comes to focus on IT, a way to increase capacity or add potentiality on the fly without investing in new infrastructure, training new personnel, or licensing new software. It encompasses 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 (PaaS), or Software as a Service (SaaS). Microsoft Azure and Google App Engine are the examples of platform as a service. The fast growth in field of "cloud computing" also increases rigorous security concerns.