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)