Proceedings of the Design Engineering Technical Conference andComputers and Information in Engineering Conference, September28-October 2, 2004, Salt Lake City, Utah. Collection of 113full-length, peer-reviewed papers on the following topics: DataModels: Retrieval, Representation; Product Lifecycle Management;Computational Manufacturing; Features and Features Based Systems;Knowledge Based Approaches; Control Systems, Real Time Systems;Mulimodal Methods; Computing in Engineering Education;Collaborative Engineering and Standards; Collaborative Systems;Product Families, Product Data Representation; Advances in CAD;Virtual Systems, Design and Manufacturing; ComputationalApproaches; Computational Engineering; Haptics: User Contexts,Managing Contact; Virtual Assembly and Immersion Environments;Design for X; Design Theory and Representations and GeometricSystems, Modeling and Analysis.