JESS help is available regarding the following topics

Introduction to JESS
Interacting with JESS programs
Chemical speciation modelling (GEM stages)
GEM stages in detail
JESS Thermodynamic database (JTH)
JESS Literature database (JLR)
Updating the JESS databases
Principles of chemical speciation
Miscellaneous JESS facilities
Titration analysis
Physicochemical properties
Recovering after database failure
JESS environment variables
Kinetic calculations
ESTA titration facility
JESS development facilities
JESS implementation