What do our brain, power supply and mobile communications have in common? Perhaps more than you may think at first glance. After all, these are highly complex networks. The first one is biological, the last twp technical. What they all have in common, however, is that they must be built up, organised, controlled, adapted to changing requirements and be optimised. But how does this work? Where are there differences and parallels? And more over: What can engineers and neuroscientists learn from each other? In three short lectures Prof. Dr. Oliver Ambacher, Prof. Dr. Ulrich Egert and Prof. Dr. Anke Weidlich compare the characteristics and functions of the respective network types and search for similarities and differences. Afterwards you will have the opportunity to get in dialog with the experts - as always in the usual informal atmosphere.