The book "Digital Computing Machines and Systems" by B. Kagana is a fascinating and deep dive into the world of computer technology, which will be a real discovery for both students and professionals in the field of information technology. In this work, the author not only talks about the principles of computing machines, but also offers the reader a unique look at the evolution of computer systems, their architecture and functioning. From the first pages of the book, the reader finds himself on an exciting journey through the history of computing machines, from the first mechanical devices to modern multi-core processors. B. Kagan masterfully combines theory with practical examples, which makes the material understandable even to those who are just beginning to get acquainted with this complex but fascinating topic. The book is full of intriguing facts and stories that not only inform, but also inspire further study. This book will be especially interesting for students of technical specialties, graduate students, as well as everyone who works in the field of information technology. If you are passionate about programming, system administration, or just want to better understand how computers work, Digital Computing and Systems will be an indispensable source of knowledge for you. In addition, the book will be useful to teachers and researchers seeking to expand their horizons and deepen their understanding of modern computing systems. The topics raised in the book cover a wide range of issues, including the architecture of computers, operating system principles, algorithms, and data structures. B. Kagan pays special attention to the interaction of hardware and software, which allows the reader to understand how the two aspects are interrelated and affect each other. The book also discusses current trends in the development of computing systems, such as cloud technologies, artificial intelligence and machine learning, which makes it relevant and in demand in the context of the rapid development of technologies. The author's style is distinguished by clarity and accessibility, which makes it easy to assimilate even the most complex concepts. B. Kagan is an experienced teacher and practitioner, which is reflected in his approach to the presentation of the material. He uses many illustrations, diagrams and examples, which makes reading not only informative, but also fascinating. In his arsenal there are already several well-known works devoted to programming and architecture of computer systems, which also deserve attention. Whether you’re looking for books on computer science, computer architecture, or just looking to expand your knowledge of information technology, Digital Computing and Systems will be an excellent choice. This book will not only enrich your knowledge, but also inspire new ideas and projects. Do not miss the opportunity to immerse yourself in the world of digital technologies with B. Kagan is an author who knows how to make complex simple and fascinating.