The steering classes of the FairRoot are stored here. The FairRun class is the base of all data processors (FairRunSim, FairRunAna, FairRunOnline, FairRunAnaProof).

The FairRootManager takes care for the input-output communication in the run classes. The FairTask is the base class for the analysis code.

The radiation length studies may be performed using the FairRad... classes.

In order to visualize the simulated particle trajectories, one should SetStoreTraj(kTRUE) of the FairRunSim object. It is possible to implement cuts via the singleton FairTrajFilter class.

The mother classes for the time based simulation are also located here (FairWriteoutBuffer, FairRingSorter, FairRingSorterTask). One finds here also the FairTSBufferFunctional providing realistic access to the time based simulated data for further analysis.