The world of computing has undergone several paradigm shifts since the dawn of the digital age. Mainframes, once the backbone of the computing industry, have been challenged by emerging technologies and platforms such as personal computers, servers, cloud computing, and edge computing. This book, "Mainframes vs Other Platforms: A Pragmatic View," is a comprehensive guide to understanding and comparing the various computing platforms, their evolution, strengths, limitations, and their respective roles in modern computing ecosystems. The purpose of this book is to provide readers with a clear understanding of mainframes and other platforms, enabling them to make informed decisions when selecting the right computing solution for their organization. This book caters to a wide range of readers, from IT professionals and managers to students and enthusiasts who want to learn more about the world of computing platforms. Throughout the book, we will explore the historical context of mainframes and other platforms, delve into their architectures and components, compare performance and cost considerations, and discuss how to select the right platform based on specific business requirements. We will also look at real-world case studies that demonstrate successful implementations, migrations, and hybrid solutions. Finally, we will examine the future of mainframes and other platforms, considering emerging technologies and their impact on the computing landscape. By the end of this book, you will have a comprehensive understanding of the key factors to consider when choosing between mainframes and other platforms. With this knowledge, you will be better equipped to determine the most appropriate computing solution for your organization, and to envision and navigate the ever-evolving landscape of computing technology.