Systems let you define the connections to your business application that you wish to extract data from.  

Once you have defined a system you can connect to your business application and Import or Create the Links between its Tables.  The Links define the relationships between the various Tables in the application and provide the foundation for the report Subjects.  A subject is a grouping of related tables that you wish to be included together for reporting purposes.

The System Wizard makes it simple for you to Create A New System or Modify An Existing System whenever you require.