Also missing: the system dynamics paradigm, where boxes are accumulators and arrows are flows. Many packages like this have existed and still exist. This is (a

Also missing: the system dynamics paradigm, where boxes are accumulators and arrows are flows. Many packages like this have existed and still exist. This is (a recent iteration) of Stella: http://sdwise.com/wp-content/uploads/2013/11/System-Dynamics-modeling-app-STELLA-Modeler-for-iPad.jpg http://sdwise.com/wp-content/uploads/2013/11/System-Dynamics... Here's VENSIM: http://www.makrosimulation.de/Screenshot-Staatpublish.jpg http://www.makrosimulation.de/Screenshot-Staatpublish.jpg Matlab's SIMULINK is kind of a generalization of this paradigm (less convenient because of too many choices to make): http://ctms.engin.umich.edu/CTMS/Content/Suspension/Simulink/Control/figures/susp_model.png http://ctms.engin.umich.edu/CTMS/Content/Suspension/Simulink...