'Materials modelling' describes the use of computer simulation for the prediction and understanding of the structure and properties of materials. The book covers a wide range of techniques, from the atomistic and quantum scale up to the continuum level, and introduces their applications in metals, ceramics, polymers and alloys. It has been based upon the Masters course in 'Materials Modelling' given at the Department of Materials Science and Metallurgy, University of Cambridge, UK, which is aimed particularly at graduate students with a background in any of the physical sciences.