Servers are centralized repositories used for storage, management and dissemination of data and information that is organized around a common body of knowledge or for a business. Datacenters are almost similar in the sense that they are facilities used to host computer systems and associated components like telecoms and storage systems.
It is important to virtualize all servers so that they can be managed easily. The operating systems for datacenters are mainly Windows and Linux. The latter is the leading server operating system and runs at least 10 fastest supercomputers in the world.
Article Source: http://EzineArticles.com/6512380