Welberry (chemistry, Australian National University) shows how computer simulation of a model crystal provides a general method by which diffuse scattering of all kinds and from all types of materials can be interpreted and analyzed. Early chapters of the book describe the experimental methods used to obtain diffuse scattering data, and later chapters illustrate key principles through simple stochastic models of disorders. Example studies of a variety of real materials are presented to document the development of computer simulation methods for investigating and analyzing disorder problems.