Three Way Scaling assumes a working knowledge of multidimensional scaling and matrix algebra, which are both introduced in earlier volumes of this series -- Multidimensional Scaling and Matrix Algebra. Arabie, Carroll and DeSarbo begin their discussion with an example of the use of the INDSCAL model, they explain the model and give a second extended example. The authors then present a detailed analysis of SINDSCAL and provide an introduction to three-way scaling models as well as individual differences clustering models.