Computer Aided Design (CAD) and Computer Aided Manufacture (CAM) have been investigated and developed since twenty years as standalone systems. A large number of very powerful but independent packages have been developed for Computer Aided Design,Aanlysis and Manufacture. However, in most cases these packages have poor facility for communicating with other packages. Recently attempts have been made to develop integrated CAD/CAM systems and many software companies are actively engaged in this field of engineering. In the present work an integrated system for Computer Aided Design, Analysis and Manufacture has been developed incorporating AutoCAD Draughting package, Finite Element Analysis software and NC machining software. In this system, the draughting and NC machining software are resident m a PC and the Finite Element and Mesh Generation programs are resident m the mainframe computer. Appropriate softwares have also been developed for effective communication between different packages of this integrated system. The difficulties experienced in making the system work and the way these facilities were solved are described in this thesis with special reference to communication software.