In this chapter we will discuss the multi-user database server programs currently shipped with SIMPOL, simpolserver.exe/simpolserver.smp and guisimpolserver.exe. The first is designed to run without a user-interface, from a command line prompt or as a service (more later). The second is designed to run on a logged in server as a window program with buttons for sharing the tables, stopping sharing, reorganizing the tables, backing them up and restoring from the back up. Both take a single parameter on the command line to tell them which configuration file to load. Both do the job fine. Using these or variations of these we have been deploying systems for years on both Windows and Linux. In the next sections we will go into each of them in more detail. Before we do that though, since both make use of the same configuration file format, let's examine that.