This textbook, designed as a comprehensive guide to fundamental computing concepts, aims to provide students with a solid foundation in the world of computers.Throughout this book, we explore the diverse fields of computer science, from the definition and history of computers to the intricacies of computer hardware, software, networking, and cybersecurity. We delve into the key principles behind data representation, programming, and the rapidly emerging trends such as Artificial Intelligence (AI), Cloud Computing, and the Internet of Things (IoT). Each chapter is crafted to not only introduce theoretical knowledge but also emphasize practical skills that are essential for students to succeed in the ever-changing landscape of technology.Our goal is to equip students with the necessary tools to understand how computers work, how they are used in various domains, and the implications of emerging technologies on society. With clear explanations, real-world examples, and hands-on exercises, this book offers a well-rounded approach to mastering the fundamental concepts of computing.