Abstract: Everyone has an opinion on what is cloud computing. It can be the ability to rent a server or a thousand servers and run a geophysical modelling application on the most powerful systems available anywhere. It can be the ability to rent a virtual server, load software on it, turn it on and off at will, or database, Perl, Python, and PHP with the ability to scale automatically in response to changing workloads. Cloud computing can be the ability to use applications on the Internet that store and protect data while Providing a service anything including email, sales force automation and tax preparation.