The papers in this volume were presented at an international symposium on Topics in Surface Chemistry which was held in Bad Neuenahr, West Germany., September 7-9, 1977. The symposium was sponsored by IBM Germany. It has been recognized for many years that our understanding of bulk phenomena and their subsequent exploitation depends largely on our ability to define correlations between microscopic structure and the physical and chemical phenomena of interest. The role played by surface phenomena in the overall behavior of a material has been a subject for speculation for a long time, but only...