Release 7.2
        Direct Force Field (DFF) 7 is an expert system for making and using
        atomistic force fields. At its core is the TEAM-FF database which contains multiple force
        fields. The database is surrounded by three major functions:
        
        1) Utilization of force field parameters with internal and external simulation engines;
        
        2) Parameterization for making new parameters and augmenting the TEAM-FF database;
        
        3) Integration of external force fields
        
        Two versions, Standard and Professional are available in DFF 7. The Standard
        version has components 1) and 3) above, the Professional
        version has additionally component 2).