There are some compelling reasons why someone with more than a couple computers would want to connect those computers into a network. What the network will actually be used for will, of course, vary depending on the needs of the person or organization creating the network. Networks can be used for simple tasks, such as sharing a printer, or they can be used for more advanced applications, such as complex point-of-sale system and worldwide video conferencing.

   All networks, whether big or small, are typically created so that users on the network can share resources and communicate. The list that follows breaks down some of the reasons for networking computers:

• File sharing. Networking computers makes it very easy for the users on the network to share application files
  
  
• Hardware sharing. Users can share devices such as printers, CD-ROM drives, and hard drives.
  
  
• Program sharing. Applications such as spreadsheets and word processors can be run over the network.
  
  
• User communication. Network allows users to take advantage of communication media such as electronic mail, newsgroups, and video conferencing.