4. The user Code.

There is primarily two pieces of code the user might need to write : The event generator (ZEUGEN), and the analysing code (ZAUSER/ZAUINI/ZAZERC). Possibly there might also be a need to add some code in the detector simulation,to handle efficiencies (ZDEFFI) and particle identification (ZDIDEN). If some very specific description of the calorimeters is needed, modifications can be done in ZDCALO, as well.