NETWORK OS Most of the network os works under the principle of client-server mechanism. Client –server is a mechanism. In which co-operation and intercommunation between various elements of network takes place and one machine service others for various functions. In a network OS , the users are aware of the existence of multiple computers and can the functionally of the remote server machines. In other words, a user doesn’t have to sit in front of machine in which he wants to work on the job of the system software is to manage the operation of computer as a whole .Where as the application program server the purpose of general useormfor application software of computer system .In other words, system software provides the peat