This collection of articles gives an indepth, state-of-the-art study of the Multichip Module (MCM) technology from systems, CAD and technology viewpoints. Multichip Module technology has been used in high-end systems, such as mainframe and supercomputers as well as military and space applications for some time. Rapid advances in VLSI technology and novel system architecture concepts have presented both challenges and opportunities for MCM technologists.