This text is about the design and use of advanced multimedia interfaces for learning. Each chapter is concerned with some aspect of the theory or practice of multimedia interfaces and their use as tools to facilitate human learning. The chapters treat the issue from a wide variety of perspectives, including human-computer interaction, interface design, artificial intelligence, intelligent tutoring systems, psychology, education and music. Three points distinguish the book: it is specifically about the use of multiple media in educational contexts; it addresses the use of multiple media within human-computer interaction, not merely the use of computers to facilitate multimedia presentations; and it addresses the problems from a variety of theoretical and practical perspectives, not simply in a technology-driven, pragmatic manner. The book is based on papers presented at a NATO Advanced Research Workshop help in September 1989 as part of the NATO Science Committee six-year Programme on Advanced Educational Technology.