GoldSim Technology Group began developing GoldSim, its probabilistic simulation platform, in 1990. The software is used primarily for engineering and scientific applications in over 60 countries worldwide. GoldSim is a graphical, object-oriented hybrid simulator that can simultaneously represent continuous and discrete dynamics. GoldSim provides powerful probabilistic simulation capabilities to support representation of uncertain and/or stochastic systems. It also provides a wide variety of specialized model objects to make models less abstract (and hence more transparent). This includes specialized modules to support Risk and Reliability Analysis, Financial Modeling, and Mass Transport Modeling.