"Computer Engineering and Its Applications" : UNIX Operating System is an indispensable guide to the complex and exciting world of modern technology for those who want to understand the fundamental principles of computer systems and master one of the most influential operating systems in the history of information technology. Despite the fact that the author remains unknown, the content of this book speaks of a deep knowledge of the subject and the desire to make complex technical concepts available to a wide audience. This book is a real storehouse of knowledge for students, engineers, system administrators and anyone interested in the development of computer technology and modern information systems. It reveals the history of the emergence and development of computing, from the first computers to modern systems, and also discusses in detail the main components of hardware, their interaction and role in the functioning of computing systems. Special attention is paid to the UNIX operating system, which has become the basis for many modern systems, such as Linux and macOS. The author masterfully explains the UNIX architecture, its main components, process control mechanisms, file system and network protocols, which makes the book a valuable resource for those who want not only to understand the theory, but also to learn how to apply the knowledge gained in practice. The book "Computer Engineering and Its Application: UNIX Operating System" is suitable for both novice specialists and experienced professionals who want to deepen their knowledge. For students of technical universities, it will be an excellent tutorial, and for practicing system administrators - a reliable guide to setting up and optimizing UNIX systems. At the age of 16 and older, readers interested in programming, networking, and system administration will find this book a wealth of useful information and practical advice. The topics raised in the book cover a wide range of issues, ranging from the basics of computing, how hardware devices work, to complex aspects of operating systems. A special place is occupied by the analysis of the UNIX architecture, its command line, scripting languages and methods of task automation. The author not only explains the technical details, but also shows how this knowledge is applied in real-world scenarios - from software development to system security. Thanks to this, the book becomes not just a theoretical tool, but a practical tool for solving urgent problems in the field of information technology. The author’s style is distinguished by clarity and logical consistency, which makes reading fascinating and understandable even for those who are just starting their way into IT. There are many illustrations, diagrams and examples in the book, which helps to better assimilate the material and see its application in real life. All in all, Computing and its Applications: UNIX Operating System is a book that deserves its place in the library of anyone who wants to understand how modern computing systems work and learn how to manage them. If you are looking for a book that combines historical insight, technical depth and practical focus, then this work will be an excellent choice for you. It will help not only to broaden your horizons, but also to acquire the skills necessary for a successful career in information technology. In a world where technology is advancing at an incredible rate, the ability to understand the basics and intricacies of operating systems such as UNIX is becoming a critical competitive advantage. Do not miss the chance to immerse yourself in the fascinating world of computing and discover new horizons of knowledge with this book.