The book "Complexity, Entropy, and the Physics of Information" is a proceedings volume from a workshop held at the Santa Fe Institute in May-June 1989. Edited by Wojciech H. Zurek, it explores the connections between quantum and classical physics, information, computation, and their significance for physical theories. The book covers topics such as the analogy between thermodynamic entropy and Shannon's information-theoretic entropy, the role of information in quantum measurements, the distinction between what is and what is known in classical physics, and the implications of these concepts for understanding complex systems. It includes contributions from various experts in the field, discussing the physics of information, the laws of physics and computation, complexity and evolution, and the physics of computation. The book aims to provide insights into how information, physics, complexity, quantum mechanics, and computation are interconnected and how these concepts can be applied to understand the universe and its evolution.The book "Complexity, Entropy, and the Physics of Information" is a proceedings volume from a workshop held at the Santa Fe Institute in May-June 1989. Edited by Wojciech H. Zurek, it explores the connections between quantum and classical physics, information, computation, and their significance for physical theories. The book covers topics such as the analogy between thermodynamic entropy and Shannon's information-theoretic entropy, the role of information in quantum measurements, the distinction between what is and what is known in classical physics, and the implications of these concepts for understanding complex systems. It includes contributions from various experts in the field, discussing the physics of information, the laws of physics and computation, complexity and evolution, and the physics of computation. The book aims to provide insights into how information, physics, complexity, quantum mechanics, and computation are interconnected and how these concepts can be applied to understand the universe and its evolution.