This book “Fundamentals of Engineering Science and Technology” contains 298 Figures and Illustrations, 34 Tables, 165 Original Problems / Solutions (practical and assumed examples), and 199 Equations / Formulas. This 567 pages book is focused on many different attractive topics related to engineering and technological applications, which are very important for human daily life activities. The underlying basic laws and principles discussed in this book are also immutable and are essential for the comprehension of future engineering and technological developments. Besides, SI units were used for all examples, calculations, problems, solutions and explanations in this book to increase the comprehensibleness. The main aim of this book is to study fundamentals of engineering and technological applications. This book is addressed to the users, technical students, technical persons, technicians, engineers, designers and researchers. In this book, figures, tables, symbols, schemas, diagrams, drawings and abbreviations as used as possible instead of text by considering the tendency of new generation technical students, engineers and researchers. This book is highly appropriate for STEM (Science, Technology, Engineering and Mathematics) and Multidisciplinary Engineering Education, and it is also an important information source particularly for engineers, designers and scientists who are interested in new designs, inventions, installations, developments, energy and all other technical applications. In addition, it should be noted that the text will not prepare students, technical persons, engineers or scientists for detailed design of any specific engine, machine, motor, device or industrial system. However, it is hoped that it will provide the basic information to permit the understanding of more specialized writings related to engineering science and technology. It is assumed that the reader has an adequate background in physics, mathematics, chemistry, thermodynamics, heat transfer, energy, engineering science and technology. It appears that chapters presented in this book will be of interest to many readers. Because, many attractive topics related to engineering science and technology has been summarized in the chapters. In addition, the chapters are also very appropriate to be improved by adding new chapters or examples for future updates. I will be grateful to readers for any comments and suggestions that could lead to improvement of the present book.