Our next article is written by Mr . Hamid Reza Fartoukzadeh and “deals with the system Dynamics”. He discusses theoretical foundations and practical approaches to system dynamics in various organizations. Although the elements of system dynamics had been used by early scholars, vigorous work for its implementation has been done by modern management scientists. J. W. Forester in his famous work, Industrial Dynamics (1961), has made a significant contribution to both theoretical and applied aspects of the system dynamics. His work is enhanced and developed by subsequent scientists who were able to use computers and simulations in developing new models to solve complicated human problems. Today the system dynamics enjoys global application and appreciation by academic and professional associations.