"Code: The Hidden Language of Computer Hardware and Software" by Charles Petzold explores the fundamentals of computing. Petzold takes readers on a journey from the basics of binary numbers and how they represent data, to the inner workings of electronic components and logical circuits. The book breaks down complex concepts in a clear and engaging manner, making them accessible to those without a technical background. A significant part of the book focuses on how computers interpret and process information. Petzold explains how various systems, such as the Internet and computer programming languages, arise from simple principles. By illustrating the evolution of technology in an understandable way, he highlights the connections between hardware, software, and the overarching nature of computation.