Original sentence: All of today's desktop OS system include support for some basic services, such as file and print sharing, over a network.But desktop OS are best reserved for the hand rum work of the average business or home user.If you are connecting to  a server to store and retrieve files, your computer must have the the client software that allows it to connect to that server for that purpose.If you work in a small office and want to share a printer connected to your desktop computer with your coworkers, you can do this,whether you are running Windows,Linux or Mac OS X, in which case your computer is providing  network service.Network OS are optimized to provide network services with support of multiple processors and support for redundancy on drives and specialized network redundancy, such as schemes in which one network server is a "mirror" of another server and is available immediately if the first server fails.Some examples for theese types of OS are.The "other" computers are called client computers, and each computer that connects to a network server must running client software designed to request a specific service.The network operating system(NOS)is an OS that is designed to run on a network serer dedicated to providing various services to other computers on the network.There are many other "under-the hood" enhancements that enable a NOS to provide reliable service.They don't work as well as servers.Windows NT Server,.Windows Server 2003,.Windows Server 2008.further, the specific client software needed varies based on the NOS running on the server