Constant-Radius Blending of Parametric Surfaces -- Functionality in Solids Obtained from Partial Differential Equations -- Featuremodelling with an Object-Oriented Approach -- Best Approximations of Parametric Curves by Splines -- A Modelling Scheme for the Approximate Representation of Closed Surfaces -- Cross Boundary Derivatives for Transfinite Triangular Patches -- Reconstruction of C1 Closed Surfaces with Branching -- High Order Continuous Polygonal Patches -- Variational Design of Smooth Rational Bezier Surfaces -- Curvature Approximation for Triangulated Surfaces -- Composition of Tensor Product Bezier Representations -- Interpolation with Exponential B-Splines in Tension -- A Characterization of an Affine Invariant Triangulation -- A Data Structure for Representing and Efficient Querying Large Scenes of Geometric Objects: MB* Trees -- Properties of Local Coordinates Based on Dirichlet Tesselations -- Automated Feature Recognition and its Role in Product Modelling -- Approximate Cr-Blending with Tensor Product Polynomials -- Shape Information in Industry Specific Product Data Model -- Free Form Deformation with Scattered Data Interpolation Methods -- C1-Smoothing of Multipatch Bezier Surfaces -- Geometric Continuity between Adjacent Rational Bezier Surface Patches.