High Quality Content by WIKIPEDIA articles! A computer simulation, a computer model, or a computational model is a computer program, run on a single computer, or a network of computers, that attempts to simulate an abstract model of a particular system. Computer simulations have become a useful part of mathematical modeling of many natural systems in physics (computational physics), astrophysics, chemistry and biology, human systems in economics, psychology, social science, and engineering. Simulation of a system is represented as the running of the system`s model. It can be used to explore and gain new insights into new technology, and to estimate the performance of systems too complex for analytical solutions.