The Student Edition of SIMULINK®, in conjunction with the Student Edition of MATLAB®, encourages users to build their own models from scratch or manipulate the existing models to create interactive simulations of real-world dynamic systems, i.e., air resistance, gear slippage, automotive clutch systems, the effects of the monetary supply on the economy, etc. Users do not need a programming background; SIMULINK® provides a graphical user interface (GUI) for building models as block diagrams, using click-and-drag mouse operations. Users define models through SIMULINK®'s comprehensive block library of sinks, sources, linear and nonlinear components, and connectors. They then simulate the models by using one of the methods from SIMULINK®'s pull-down menu or by entering commands in MATLAB®'s command window.