Our sincere congratulations to the journal AT International on its 50th anniversary! This marks a major success – AT uniquely combines editorial topicality, high scientific standards and a firm focus on practical matters. It is frequently said of the preparation technology market that it is not particularly “change-friendly”. Closer scrutiny reveals a number of trends among manufacturers of machinery and plant technology which contradict this prejudice. A process of concentration has been observable among machine and plant makers in Europe for many years. This move toward fewer, more tightly focussed, globally active suppliers will continue. The operators of preparation technology expect systematically targeted solutions to their particular problems. And this aim must be reached with the highest possible system-technology availability, low operating costs and adherence to public-law regulations. Mobile plant technology has achieved significant technical advances in recent years and has become a genuine alternative to stationary facilities. Natural resources are heading in all fields into a time of scarcity. This is also true of gravel and rock, since approvals mining and quarrying activities are becoming increasingly difficult to obtain. The result is that yields must be increased and that recycling will gain in importance.