This volume summarizes the results of a three-year project on the specification, implementation, testing and application of standardized interface processors for product data exchange between different systems in the design, planning and manufacturing of mechanical products. The reported results show how close the project has come to the final goal of a broadly accepted international standard for product data exchange. Processors and interpreters were developed for several commercial CAD, programming, simulation and control systems. Applications include the welding of ship parts, the assembly of car motors, and filament winding of aircraft parts.