Attempting to predICt aspects of the behaviour of some system by creating an approximate (mathematICal) model of it. This can be done by physICal modelling, by writing a special-purpose computer program or using a more general simulation package, probably still aimed at a partICular kind of simulation (e.g. structural engineering, fluid flow). TypICal examples are aircraft flight simlators or electronIC circuit simulators. A great many simulation languages exist, e.g. Simula. See also emulation, Markov chain. Usenet newsgroup: news:comp.simulation. (1995-02-23)