CONTENTS -- EDITORIAL ADVISORY BOARD -- Preface -- Act always so as to increase the number of scientific perspectives -- From Vienna to California: a journey across disciplines -- Artificial neural nets and BCL -- Von Foerster meets Kohonen -- The origin and conservation of self-consciousness -- Constructive memory -- Inside embodiment - what means embodiment to radical constructivists? -- Cybernetics and embodied cognition: on the construction of realities in organisms and robots -- EigenForm -- Visualization of concept formation and learning -- A theory of concepts and their combinations I -- A theory of concepts and their combinations II: A Hilbert space representation -- Observing quantum systems -- Self-organization, knowledge and responsibility -- Autonomy: starting point and goal of personal and social change -- What I learned from Heinz von Foerster about the construction of science -- A peaceful coexistence of epistemologies - philosophy from the constructivist's point of view -- Special announcements -- Robotica -- Note from the publisher.