High Quality Content by WIKIPEDIA articles! In computer science, a simulator is a software program to model a real-life situation on a computer so that it can be studied to see how the system behaves. By changing variables, performance predictions may be made about the behaviour of the system. A computer simulator can be either an Instruction Set Simulator or a full system simulator. Computer simulation has become a useful part of modeling many natural systems in physics, chemistry and biology, and human systems in economics and social science (the computational sociology) as well as in engineering to gain insight into the operation of those systems. A good example of the usefulness of using computers to simulate can be found in the field of network traffic simulation. In such simulations the model behaviour will change each simulation according to the set of initial parameters assumed for the environment. Computer simulations are often considered to be human out of the loop simulations.

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