Mainframe systems programming is a critical field that requires a deep understanding of the underlying hardware, operating systems, and software components that comprise mainframe computer systems. Mainframes are still widely used in many industries, particularly in finance, healthcare, and government, where they offer unparalleled processing power, reliability, and security.

As a mainframe systems programmer, you will be responsible for configuring, optimizing, and maintaining the mainframe system's hardware and software to ensure it runs efficiently and effectively. This involves a range of tasks, including installing and configuring software, managing system resources, monitoring system performance, and resolving any issues that arise.

This book aims to provide a comprehensive introduction to mainframe systems programming, covering the fundamental concepts, tools, and techniques required to work with these complex systems. Whether you are a seasoned programmer looking to expand your skillset or a newcomer to the field, this book will provide you with the knowledge you need to become an effective mainframe systems programmer.

Throughout the book, we will cover a range of topics, including mainframe hardware architecture, operating system fundamentals, system programming languages and tools, and techniques for troubleshooting and performance tuning. We will also explore emerging trends and technologies in the field, such as virtualization and cloud computing.

Ultimately, our goal with this book is to provide you with a solid foundation in mainframe systems programming that will enable you to tackle complex projects and effectively manage mainframe systems in a professional setting. We hope you find this book informative, engaging, and useful as you embark on your journey into the exciting world of mainframe systems programming.

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