This volume is about a symposium which had two purposes: to present the work that Hans Kleinpoppen has done or initiated during his remarkable scientific career, and to bring people from various fields together who perform complete scattering experiments. Hans Kleinpoppen's work included electron and photon impact experiments which were accompanied by studies of entangled states - a field of current high interest. Hence this volume of proceedings arising from the conference represents a tribute to Hans Kleinpoppen as well as an individual reference work.