Computer simulation - Computer Aided Design
Computer simulation is the manner of designing a model of a real or theoretical physical system, not including the model on a digital computer and analyzing the execution output. Simulation embodies the principle of "learning by doing": to learn regarding the system we must first assemble a model of several sorts and after that operate the model. The utilization of simulation is an activity which is as natural as a child who plays role. Children understand the world around them via simulating along with toys and figures, most of their interactions along with the other people, animals and objects. Like adults, we lose several of this childlike behavior but recapture it later on via computer simulation. To know reality and all of its complexity, we should build artificial objects and dynamically perform our roles along with them.