The worlds synthesized in the cyberspaces of networked computers are the theme of this book. Its purpose is to discover the architecture and design of cyber worlds by synthesizing worlds in cyberspaces. The book's topics are selected to clarify the issues of the philosophy, architecture and design of cyberworlds through a wide variety of case studies. It provides materials for living in the real world as well as for living through cyberworlds, for running world politics, planning corporate global strategies, managing research institutions, and planning life on a firm basis.