As a company, Sita New Multimedia and Sita Group of Companies, we have been deeply involved in the Open Source movement from its early stages, engaging in promotion, awareness campaigns, consultancy, implementation, and support services. Our commitment is solely dedicated to Open Source, and this book is intended for anyone interested in gaining a comprehensive understanding of Open Source—from awareness to mastery. Over the years, we have witnessed the remarkable growth of the Open Source movement, experiencing firsthand the transformative power of Open Source solutions through their actual implementation, as highlighted in this book. We have also observed the increasing adoption of Open Source solutions across industries and the growing trend of proprietary vendors integrating Open Source technologies into their offerings. This book serves as an introduction to Open Source, offering foundational insights, while our future series will delve deeper into our consulting and implementation experiences. Being actively involved in the Open Source community, we have had the privilege of collaborating with global Open Source communities on various innovative solutions and implementations, further enriching our understanding and contribution to this dynamic ecosystem.