Invited Papers. Recent progress in structure determination by LEED (M.A. Van Hove, G.A. Somorjai). Scanning tunneling microscopy (M.S. Khaikin et al.). Low energy electron microscopy and normal incidence VLEED (E. Bauer). NEXAFS and SEXAFS of chemisorbed low-Z atoms and molecules (J. Haase). Structure and composition of alloy surfaces by LEED (Y. Gauthier). X-ray photoelectron diffraction (Ch.S. Fadley). The recent understanding of the defect structure at semiconductor interfaces (H. Flietner). Recent progress in the electron theory of solids and their surfaces: the tight-binding muffin-tin orbital method (J. Kudrnovský, V. Drchal). Theoretical aspects of electron damping (I. Bartoš). Angle-resolved Auger electron spectroscopy (ARAES) for (110) nickel face clean and covered with sulphur (S. Mróz et al.). Theories of crystal surface melting and non-melting (E. Tosatti et al.). Structural phase transitions and their relation to electronic and dynamic properties of Si(110) face (B.A. Nesterenko et al.). Thermodynamic aspects of surface defects. First-principle calculations (M. Scheffler). Photoelectron spectroscopy of small particles and thin films of s- and d- metals; size effect in their electronic structure (G.A. Katrich, A.G. Naumovets). Ion mixing of metal superlattices (P. Mikolajczak, G. Gladyszewski). Clean semiconductor surfaces covered by Ag at low temperatures (V.A. Grazhulis). Theory of thermal energy He scattering from adsorbates (B. Gumhalter). Interfaces and layered structures (quantum wells and superlattices) (F. Garcia-Moliner). Recent developments in photoemission (K.C. Prince). Unoccupied electron states at clean and adsorbate covered surfaces (V. Dose). Tunneling and mesoscopic fluctuations in quantum Hall effect (V.L. Pokrovsky et al.). Optical spectroscopy of semiconductor surface (V.I. Safarov et al.). Short Contributions. FEM study of the metal-insulator-metal system (J. Sotola, Z. Knor). Structure optimization by means of total energy calculation for X(111)2x1 and X(100)2x1 surfaces (X=C, Si, Ge, &agr;-Sn) (F. Bechstedt, D. Reichard). XPS study of chemisorption of carbon monoxide and oxygen on dysprosium (Z. Bastl et al.). Adsorption of Cs on Th(100) - phases and phase transitions (K. Heinz et al.). Defect structure characterization of MBE-grown GaAs(001) surfaces by RHEED intensity profile analysis (L. Däweritz et al.). About the segregation of phosphorus on an iron(111) surface (W. Arabczyk et al.). High resolution electron energy loss spectroscopy study of the interaction of oxygen with a Mo(111) surface (P. Stefanov, Ts. Marinova). Time evolution of atomic state occupations during ion-surface scattering (K.J. Snowdon, A. Närmann). A Gaussian wave packet method for studying dissociation of diatomic molecules on solid surfaces (J. Gryko). Angle-resolved photoemission of the initial stages of interface formation between Pb and Si(111)7x7 (G. Le Lay et al.). The photoelectron study of surface states on InP(100) (V. Cháb et al.). Empty surface state on Pd(111) (J. Koukal). Calculation of electronic structure for a crystal surface or interface (F. Máca, M. Scheffler). Influence of the matrix on boron detection by AES (A. Jablonski et al.). Lanthanide adsorption and interface formation on transition metals. Case study - Yb/Ni(100) (A. Nilsson et al.). Electronic properties of the clean and oxygen exposed GaAs(100) surface (J. Szuber, B. Adamowicz). Posters (38 poster papers). Author Index.