Part 1 Report on the Second Ringberg Symposium, Ulrich Joos and Rainer Moufang: the international protection of intellectual property under the Berne, the Paris and the Universal Copyright Convention; the GATT-initiative - introductory lectures and statements; discussion of the GATT initiative. Part 2 Lectures and statements: general principles of the Berne and the Universal Copyright Conventions, Paul Katzenberger; national treatment, reciprocity and retorsion - the case of public lending right, Silke von Lewinski; national treatment, reciprocity and retorsion - the case of computer programs and integrated circuits, Thomas Dreier; the US proposal for a GATT-agreement on intellectual property and the Paris Convention for the Protection of Industrial Property, Hans Peter Kunz-Hallstein; the present position of the US, Japanese and European Industry, Friedrich Kretschmer; GATT principles and intellectual property protection, Wolfgang Fikentscher; GATT - industrial property protection, fair trade and development, Hanns Ullrich.