CAD84: 6th International Conference and Exhibition on Computers in Design Engineering is a collection of 64 conference papers that covers a wide range of topics on computer-aided design (CAD) and CADCAM, including CAD process plant designs, techniques, drafting systems, electronics, geometric design, kinematics, mechanical engineering, solid modelling, and structures. The book starts by describing the progress that has been made in hardware and software. The text continues by presenting papers about interactive system for the design and production of computer programs; an algorithmic language for the definition and manipulation of drawings; and a software tool to enable application dialog input to be developed for new or existing programs with or without problem-oriented language. Papers on the design of a drawing system that consists of a language kernel for tailoring the system to support various styles and practices and on an automated drawing and cost estimation program for platform frame construction named HOUSE24 are also presented. The book also discusses HILO-2, which is a single coherent system for design verification, fault simulation, and test vector generation. The text will benefit both students and professionals using CAD.