Cloud computing is a technology that uses the internet and central remote server to maintain data and application. Cloud computing allows consumers and business to use application without installation and access their personal files at any computer without internet access. This technology allows for much more efficient computing by centralizing storage, memory, processing, and bandwidth. Simple examples of cloud computing are yahoo mail, Gmail. To get benefits of usage of software and hardware like sending mails etc., why should a consumer buy it? Just use and pay for that particular time period.