Theory of simulation methods for lattice and defect energy calculations in crystals -- Theory and calculation of defect entropies -- Characteristic volumes of point defects in tonic crystals -- Free energy calculations for crystals -- Molecular dynamics simulations of crystalline ionic materials -- Ab initio cluster calculations for defects in the solid state -- Computational methods for the electronic structure of defects in insulators -- Interatomic potentials in solids -- Potentials in metals -- Interionic potentials in ionic solids -- Interatomic potentials in covalent and semi-covalent solids -- Defect calculations for ionic materials -- Point defect calculations in metals -- Defect calculations in semiconductors -- Computer modelling of complex and massively disordered crystalline solids -- Aspects of the chemistry of phyllosilicates and intercalation in vermiculites -- Aggregation and precipitation in alkali halides -- Computer simulation of fast ton conductors -- Computer simulation of ionic crystal surfaces -- Long range order in non-stoichiometric oxides.