General preface. Preface. 1. Fundamentals of the electronic structure of surfaces (E. Wimmer, A.J. Freeman). 2. Electronic structure of semiconductor surfaces (J. Pollmann, P. Krüger). 3. Electronic states on metal surfaces (G. Borstel, J.E. Inglesfield). 4. Electronic structure of adsorbates on surfaces. Adsorption on semiconductors (C.M. Bertoni, G. Roma, R. Di Fleice). 5. Theory of adsorption on metalsubstrates (M. Scheffler, C. Stampfl). 6. Experimental probes of the surface electronic structure (F.J. Himpsel). 7. Electronic structure of semiconductor surfaces (K. Horn). 8. Surface states on metal surfaces (S.D. Kevan). 9. Magnetism at surfaces and in untrathin films (C.M. Schneider, J. Kirschner). 10. Adsorption on metals (H.-J. Freund, H. Kuhlenbeck). 11. The metal-semiconductor interface (R. Ludeke). 12. Electronic structure of adsorbates on semiconductors (R. Miranda, E.G. Michael). 13. Some properties of metal overlayers on metalsubstrates (S.-Å. Lindgren, L. Walldén). 14. Many-body effects in photoemission (G.D. Mahan, E.W. Plummer). Author index. Subject index.