Computer simulations are computer-generated versions
of real-world objects (for example, a sky scraper or chemical molecules)
or processes (for example, population growth or biological decay). They
may be presented in 2-dimensional, text-driven formats, or, increasingly,
3-dimensional, multimedia formats. Computer simulations can take many
different forms, ranging from computer renderings of 3-dimensional geometric
shapes to highly interactive, computerized laboratory experiments.