The aim of this symposium was to bring together scientists from several subfields of materials theory and simulations. Its purpose was: to make contact with traditional continuum approaches to materials theory; to discuss critically current developments in computational and simulational approaches specifically aimed at addressing real materials problems, and with emphasis on parallel computing; and to present examples of the most successful applications of computational and simulational work to date. The main topics of the symposium were: (1) Advances in Computational Methods; (2) Parallel Algorithms and Applications; (3) Fracture, Brittle/Ductile Behavior and Large Scale Defects; (4) Thermodynamic Stability of Materials; (5) Surfaces and Interfaces of Materials; (6) Complex Materials Simulations. Separate abstracts have been prepared for most papers in this book.