It is the use of remote servers on the Internet to store manage and process data rather than local server.

Refers to the servers that are accessed over the Internet. It means storing ,managing and accessing the data and programs on the remote servers that are hosted on Internet instead of computer’s hard drive.

It is on demand availability of computer system resources without direct active management by the user.

The key elements of cloud computing

• Computing resources packaged as a commodity and made available over the internet
• The ability for end-users to rapidly provision the resources they need.
• A pricing model that charges consumers only for those cloud resources they actually use.