Information Technology (IT) has made its presence felt in every aspect of life. But along with IT has come huge amounts of data. Data is the vital aspect of all forms of life. The more data we have, the more precise and accurate the conclusion. But along with huge amount of data has come a new problem – space. The problem to store more and more data has become a big headache for big organisations. No doubt they could buy more storage devices and store the data, but the problem did not end there. The next problem which came along with storage problem was maintence, which means more manpower, more physical space (to store those devices) and last but not the least, security, be it in the sense of physical theft, cyber theft, viruses, tural & artificial calamities — and to maintain all of these means huge amount of money. An IT company may well think to have its own IT storage house or Data Centre, but a non-IT company will think twice before incurring such a big expense. Altertively even if a company plans of have its own IT storage house, the IT peripherals along with all the other accessories will be a very big bargain for the company. But as the saying goes ‘Necessity is the mother of invention’, so when people started to feel the necessity, a magnificent altertive solution came – mely, ‘Cloud Computing’.