This edited text gives a comprehensive picture of the state-of-the-art in authoring systems and authoring tools for advanced technology instructional systems. Issues of authoring, cost-effectiveness, interoperability and re-usability have been at the forefront in recent years in educational software in general and in the field of advanced, adaptive and intelligent educational software more specifically. The book includes descriptions of 15 systems and research projects from almost every significant effort in the field of advanced technology authoring systems. Included is a chapter comprising of an extensive overview of the field, summarizing the work of dozens of systems and projects and providing an analytical framework for comparing them. The book should appeal to researchers, teachers and advanced students working in the following areas: education, instructional technology and computer-based education, psychology, cognitive science and computer science.