Book 747 Applied computer systems: Part. : Problem solving by numerical methods in Excel spreadsheet environment" by Galkin C. P. and Mikhailov V. K. is a unique tutorial that opens the door to the world of numerical methods and their practical application with one of the most popular tools - Microsoft Excel This book will become an indispensable assistant for students, graduate students, as well as specialists working in the field of applied mathematics, engineering and information technology. In their work, the authors strive to make complex mathematical concepts accessible and understandable. They offer readers not just theoretical calculations, but also practical examples that can be easily reproduced in Excel. This allows not only to assimilate the material, but also to put it into practice, which is especially important for students seeking a real understanding of the subject. The book covers a wide range of tasks, from simple to more complex, which makes it useful for both beginners and those who already have experience with numerical methods. Topics raised in the book include numerical methods for solving equations, interpolation, approximation, integration, and differentiation, and data analysis. Each section contains detailed explanations, graphic illustrations and step-by-step instructions, which allows readers to easily follow the material and apply it in their projects. This manual not only teaches, but also inspires experiments with data, which can lead to new discoveries and solutions. The book will be of interest not only to students of technical specialties, but also to everyone who wants to improve their skills in working with Excel and learn how to use it to solve real problems. It is suitable both for self-study and for use in training courses, seminars and practical classes . If you are interested in topics such as applied mathematics, statistics, data analysis or just want to improve your skills with spreadsheets, this guide will become a real storehouse of knowledge for you. The style of the authors is distinguished by clarity and accessibility, which makes complex concepts understandable even for those who are just starting their way in the world of numerical methods. Galkin and Mikhailov are experienced teachers and practitioners who know how to convey information to the reader Their previous work was also popular among students and professionals, which confirms the high level of their expertise and ability to teach. The book "Applied computer systems" not only teaches, but also inspires further study and application of numerical methods in various fields. It will help you not only to master the basics of working with Excel, but also teach you to think critically and find solutions in difficult situations. If you are looking for a tutorial that combines theory and practice, this edition will be a great choice. Do not miss the opportunity to improve your skills and expand your knowledge in the field of numerical methods and work with Excel. This book will be your reliable companion in the world of applied computer systems, opening up new horizons and opportunities for your professional growth.