This book contains a selection of papers about a broad range of topics relating to CAD modelling and graphics. These papers present an excellent overview of the research and application work done at different R&D institutions in Europe and USA. The papers are grouped into sections. First, issues in feature-based product development (such as representation of form features, consistency management, and reasoning) are addressed from different perspectives. Next, CAD models and architectures are introduced from an application perspective. Then some design techniques are presented. The following sections deal with communication in design and analysis, input and interaction techniques, and visualization.