Event generators are an indispensable tool for the preparation and analysis
of particle-physics experiments. In this contribution, physics principles
underlying the construction of such computer programs are discussed. Results,
within and beyond the Standard Model of particle physics, obtained with a new
event generator are presented. This generator is capable to describe signal
processes for exotic physics and their backgrounds at electron-positron and
proton-(anti)proton colliders.Comment: 10 pages, 13 figures. Talk given by G. Soff at the 25th Course of the
International School on Nuclear Physic