Our "Who's Who" list is organized by these categories: Assembly, deformation, and process animation Biomedical applications Blends and offsets Boundary representations and topological extensions Collaborative/distributed design Computational Geometry Computational support for new manufacturing technologies Conceptual design techniques Constructive Solid Geometry Deformations and 3D morphing Engineering analysis using solid models Engineering tolerances Entertainment applications Feature-based modeling Geometric compression Geometric reasoning Heterogeneous models Interactive graphics, non-realistic rendering, and analysis visualization Manufacturing and assembly planning Motions and sweeps Multi-resolution models NC simulation Parametric and subdivision surfaces and their intersections Procedural, constraint-based and parametric modeling Product and assembly modeling Product data exchange Representation conversion Reverse engineering Robustness of geometric computations User interaction techniques Virtual environments and prototypes