Simulation is the preferred approach for engineers and scientists who design complex systems because it allows them to test the design of system performance standards. It gives an introduction to computer-aided design systems with Simulink, powerful simulation tools, accurate, and easy to use. The author takes readers on a tour of Simulink environment that shows how to develop a model system and run the design steps required to create a laboratory model of the design function. Signal Processing Blockset extends Simulink into the field of both analog and digital signal processing; Stateflow is used to chart the state and the signal flow for modeling event-driven system; SimPowerSystems handle physical modeling, especially modeling of the electrical circuit including electrical power systems, motor drives, power generation equipment, and three-phase transmission lines of electricity, and SimMechanics develop models of mechanical systems like robots.