Part 1 Models and natural systems: chaos on many body quantum systems, C. Presilla et al; atomic clusters - laboratories for studying chaos and ergodicity, R.S. Berry; concerning fluctuations in quantum chaos, G. Casati and B. Chirikov; persistent fluctuations in globally coupled chaotic systems, G. Perez et al. Part 2 Artificial microstructures: order and chaos in a quantum system - semiclassical electron effusion theory of conductance through a microscopic junction, J.B. Delos et al; breakdown of the law of large numbers in Josephson junction series arrays, D. Dominguez and H.A. Cerdeira; antidot arrays - chaotic dynamics in magnetotransport experiments, D. Weiss and K. Richter. (Part contents).