Cloud computing refers to the delivery of computing resources over the Internet. Instead of keeping data on our own hard drive or updating applications for our needs, we use a service over the Internet, at another location, to store our information or use its applications. Examples of cloud services include online file storage, social networking sites, web mail, and online business applications. In simple word a CLOUD means "The Internet (non-local storage, software etc)".-Cloud computing refers to the delivery of computing resources over the Internet. Instead of keeping data on our own hard drive or updating　applications for our needs, we use a　service over the Internet, at another location, to store our information or　use its applications. Examples of cloud services include online file storage, social networking sites, web mail, and online business applications. In simple word a CLOUD means "The Internet (non-local storage, software etc)".