Microsoft has recently announced a new version of the Cloud Computing Windows namely Windows Azure. This window lives up exclusively in Microsoft Cloud. This platform is been given to the people to the developers to host as well as to distribute the software which is running on the internet. Therefore, it is very clear that it is not a service that is for the end user. Nevertheless, it will be of use to you only if your areas of interest include Web services, SOAP and WSDL. For the end users it is helpful but only to welcome them to an environment of web application. Open source cloud computing has given us the foundation for a large no. of cloud computing implementations. A foundation named Free Software released GPLv3 whose main purpose was to fill up a legal loophole that was about the software that could run free of cost over the entire network. It released in November 鈥?7 and named Affero General. The growth of cloud computing depends largely on the open standards. Numerous open standards are currently under development while some of the vendors have switched to other APIs. However, it is been seen that a majority of cloud providers expose to those APIs, which are unique in their application, are documented properly and hence are not at all interoperable. The OCC that is Open Cloud Consortium has been working hard to develop all standards and policies related to cloud computing. Go through the resource given below for cloud computing as I have learned a lot from this. Cloud Computing Model .Tarun Mittal writes on Cloud Computing Model .