Recently, the collaboration between theory and experiments in high-energy physics has become again more fruitful, important and practically indispensable. The contributions to this volume clearly summarize, in terms of the standard model of elementary particles, the present understanding of high-energy physics and present an outlook how to go beyond this standard model. Phenomenological aspects are stressed outlining possible extensions of the standard model with main topics covering higher order corrected electroweak interactions, CP violation, quark flavour mixing, lattice QCD, and dynamical electroweak symmetry breaking. Many new experiments are described to explore high-energy physics either by the highest available accelerators or by very high precision experiments forrare processes. Including a variety of theoretical models proposed beyond the standard model, it presents a global knowledge and a balanced view of high-energy physics reaching beyond this decade.