Cloud computing is a general term and style of computing that involves delivering scalable resources that are provided as a service over the Internet. The term “cloud” is a metaphor for the Internet. Cloud computing is considered an updated version of utility computing. This allows you the capability to have servers available over the Internet. The users do not need to have knowledge or control over the infrastructure in the “cloud” that supports them. These services are divided into three categories: Infrastructure-as-a-Service (IaaS), Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS).

IaaS provides customers with application program interface (API) to start, stop, access and configure their servers. Due to this application existing “as-a-Service”, it gives the capability to pay as you go. PaaS is a set of tools such as software and product development tools that are hosted on the vendor’s infrastructure. The creators develop applications onto the vendor’s platform over the Internet. SaaS is a very broad range of applications. The vendor supplies the hardware infrastructure that is hosted on their server and allows interaction with the user. SaaS can be used from anywhere a browser is available if the end user has access to the Service.

Cloud computing allows IT personnel to increase capacity or add capabilities on demand without purchasing a new infrastructure, re-training, or licensing new software. Cloud computing is very beneficial for organizations that have a set goal to grow without spending the large cost that comes with purchasing software applications to better their organization. This also makes way to the opportunity of “try it before you buy it”.