Cloud Computing is a technology that uses the internet and central remote servers to maintain data and applications. Cloud computing allows consumers and businesses to use applications without installation and access their personal files at any computer with internet access. This technology allows for much more efficient computing by centralizing data storage, processing and bandwidth.
A simple example of cloud computing is Yahoo email, Gmail, or Hotmail etc. All you need is just an internet connection and you can start sending emails. The server and email management software is all on the cloud ( internet) and is totally managed by the cloud service provider Yahoo , Google etc. The consumer gets to use the software alone and enjoy the benefits. The analogy is , 'If you need milk , would you buy a cow ?' All the users or consumers need is to get the benefits of using the software or hardware of the computer like sending emails etc. Just to get this benefit (milk) why should a consumer buy a (cow) software /hardware ?
            Cloud computing is broken down into three segments: "application" "storage" and "connectivity." Each segment serves a different purpose and offers different products for businesses and individuals around the world. In June 2011, a study conducted by VersionOne found that 91% of senior IT professionals actually don't know what cloud computing is and two-thirds of senior finance professionals are clear by the concept,reference name,version OneStudy amongst-it-professionals.php|title Cloud Confusion Amongst IT Professionals|publisher Version One|date=June 6, 2011 highlighting the young nature of the technology. In Sept 2011, an Aberdeen Group study found that disciplined companies achieved on average an 68% increase in their IT expense because cloud computing and only a 10% reduction in data center power costs.

         Cloud Computing Services Market - Global Industry Size, Market Share, Trends, Analysis And Forecasts, 2012 - 2018|publisher=Transparency Market Research. Cloud computing is a technology which uses internet and one remote server to maintain data and various applications. Cloud computing provides significant cost effective IT resources as cost on demand IT based on the actual usage of the customer. Due to rapid growth, many companies are unable to handle their IT requirement even after having an in-house datacenter. Cloud services helps to improve IT capabilities without investing large amounts in new datacenters. This technology helps companies with much more efficient computing by centralizing storage, memory, processing and bandwidth.
Application


           Cloud computing is a network server which provide capability of sharing data to organization without sharing there personal information


         Cloud Computing Deployment Models and Concepts 'Community CloudCommunity cloud shares infrastructure between several organizations from a specific community with common concerns , whether managed internally or by a third-party and hosted internally or externally. The costs are spread over fewer users than a public cloud (but more than that of a private) to realize its cost saving potential.
Public Cloud
        A public cloud is established where several organizations have similar requirements and seek to share infrastructure so as to appliance. In addition, it can be economically attractive as the resources (storage, workstations) utilized and shared in the community are already exploited.
This is the cloud computing model where service providers make their computing resources available online for the public. It allows the users to access various important resources on cloud, such as:Software, Applications or Stored data. On of the prime benefits of using public cloud is that the users are emancipated from performing certain important tasks on their computing machines that they cannot get away with otherwise, these include:Installation of resources, their configuration; and Storage.
Advantages of using Public Cloud For obvious reasons, public cloud is bound to offer a multitude of benefits for its users, which can be sensed by its ubiquitous demand. Some of the most important ones are mentioned here.
1. Efficient storage and computing services 2. Inexpensive, since all the virtual resources whether application, hardware or data are covered by the the service provider. 3. Allow for easy connectivity to servers and information sharing. 4. Assures appropriate use of resources as the users are required to pay only for the services they require. 5. Highly reliable and redundant. 6. Widespread availability irrespective of geographical precincts. 7.Sets the business people free from the hassles of buying, managing and maintaining all the virtual resources at their own end, the cloud server does it all. 8. Public cloud, in today's advanced workplace, empowers employees and enable them to become productive even when outside the office. The SaaS model ensures that corporations save on IT expenditures while delivering the flexibility of productivity software on the cloud.
Private cloud

iCylanAPP enables you to remote access the sensitive applications of enterprises by smartphones or tablet device anywhere and anytime. The cloud-based resources are delivered to one platform, which providing high performance, security, and user experience. You can access the desktop, run applications, change settings, and access data exactly as you are sitting in front of the local PC, using its keyboard and mouse.
iCylanAPP has three versions, such as Standard Edition, Advanced Edition, Enterprise Edition, which providing proven security of different class. It can connect to any Windows applications running a iCylanAPP Client on smartphones or tablets devices.Nowadays, it supports the current systems,such as google Android, Mac iOS,windows Phone 7 or BlackBerry.
What does a Shift Towards Cloud Computing Mean? A paradigm shift to cloud computing will affect many different sub-categories in computer industry such as software companies, internet service providers (ISPs) and hardware manufacturers. While it is relatively easy to see how the main software and internet companies will be affected by such a shift in Ginger's chunky nuggets, it is more difficult to predict how companies in the internet and hardware sectors will be affected. Most of the major companies have launched their product. IBM launched their new SmartCloud data center in Japan in 2011.