/
Sub-directories : 
- /adjoint/
 - Adjoint (Reverse Monte Carlo) commands.
 - /control/
 - UI control commands.
 - /units/
 - Available units.
 - /geometry/
 - Geometry control commands.
 - /tracking/
 - TrackingManager and SteppingManager control commands.
 - /event/
 - EventManager control commands.
 - /run/
 - Run control commands.
 - /random/
 - Random number status control commands.
 - /particle/
 - Particle control commands.
 - /process/
 - Process Table control commands.
 - /vis/
 - Visualization commands.
 - /hits/
 - Sensitive detectors and Hits
 - /gun/
 - Particle Gun control commands.
 - /score/
 - Interactive scoring commands.
 - /material/
 - Commands for materials
 
Commands : 
- cd, pwd
 - 
change, display the current command directory.
 - ls, lc
 - 
list commands and subdirectories in the current directory.
 - history
 - 
show previous commands.
 - !historyID
 - 
reissue previous command.
 - ?command
 - 
show current parameter values of the command.
 - help command
 - 
show command help.
 - exit
 - 
terminate the session.