Cloud computing

Cloud computing

Cloud computing = Computing in a cloud, means storing and accessing data and programs over the Internet instead of your computer's hard drive. With Cloud computing, users can access files and use applications from any device that can access the Internet.

Cloud computing is the use of hardware and software to deliver a service over a network (typically the Internet). The cloud is just a metaphor for the whole Internet... 

Cloud computing is the practice of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local "on-premise" server or a personal computer.

Main types of Cloud computing:

IaaS = Infrastructure as a Service = A third party hosts elements of infrastructure, such as hardware, software, servers, and storage, also providing backup, security, and maintenance.

SaaS = Software as a Service  = sometimes called "on-demand software", a delivery model in which software is licensed on a subscription basis and is centrally hosted. An example of a Cloud computing SaaS provider is Gmail.

PaaS = Platform as a Service = a platform-based service or model that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.