Client An application that runs on a computer and relies on a server to perform some operations. For example, an email client is an application that enables you to send and receive email. Operating System Operating systems provide a software platform on top of which other programs can run. It is the most important program that runs on a computer. Every PC must have an operating system to run other programs.
Operating systems perform basic tasks.
Network Operating System Software that enhances a basic operating system by adding networking features. Microsoft Exchange Teamed with Outlook, Exchange offers integrated messaging, calendaring, and information management. How to change your password The new system will ask you to change your password the first time you log in. Our new system will look a great deal like our old. Much of the desktop looks the same.