This book is a comprehensive reference designed to present computer science material in an easy and clear way for students. It has been crafted to cover both basic and advanced topics that help students understand and apply technological concepts in their daily lives and academic fields. Through five organized chapters, we provide you with an informative journey that begins with the basics of computers and their types, and continues exploring concepts such as programming, operating systems, and computer security. Not only that, but the book also includes innovative topics on the use of technology in business, such as e-commerce, business automation, and data analytics. In this book, we believe that technology is a fundamental element of modern life, so the chapters are designed to integrate theory with practical application. You will learn how to use various software tools and gain a deeper understanding of the systems that manage the devices we use daily, such as operating systems and artificial intelligence. The book targets students and technology enthusiasts who want to build a solid knowledge base around computing and its practical applications. We aim for this book to empower students to become part of the rapidly advancing digital future and play a role in shaping the technology of tomorrow. This book has been prepared by Netskills Online Open University, an innovative educational platform that aims to deliver electronic educational content in a flexible and comprehensive way. You can visit the website for more information about the platform and available courses: https://netskills-open-university.infy.uk/We hope that students find this book a rich source of information that enriches their knowledge and broadens their horizons. We believe that a deep understanding of technology is a crucial step towards innovation and contributing to modern digital communities.