In the present world time is money, as of with prosthodontics also. CAD /CAM had made speed and accuracy to a extent that normally it is unimaginable In the last 20 years this technology has grown without Boundss. The introduction of computer-aided design and computer-aided manufacturing (CAD/CAM) technology. In relation to the rapid progress being made in computer-assisted processing technology in various industries since the 1970s, research and development of dental CAD/CAM systems has been actively pursued worldwide since the 1980s, including in Japanese academies. Such as all-ceramic restorations, we describe the recent history of the development of dental CAD/CAM systems for the fabrication of crowns and FPDs, based on our 20 years of experience in this. We also summarize the current state of commercial dental CAD/CAM systems that have been developed around the world, with particular focus on the of ceramic crowns and FPDs [1]. This article provides an overview of the development of various CAD/CAM systems. Operational components, methodologies, and restorative materials used with common CAD/CAM systems are discussed. Research data and clinical studies are presented to substantiate the clinical performance of these systems.