Server: In very small networks, it is possible to set up a local network without a server. However, once there are more than five computers in use, it is advisable to install a high powered and high capacity server. The server stores centralizes information across a medical office. In medical offices, due to the amount of data being moved and the need for centralized storage for documents, you should have a server. This requires ongoing maintanace and greater cost, as you will need to purchase software licenses, anit-virus software, etc.