This text investigates the fundamental principles of operating system design and their practical implementation. The book, revised for MINIX 3, serves as a tutorial and reference for introductory courses and professional programmers alike. It uniquely combines theoretical explanations with a detailed, Unix-like operating system example, MINIX, which has been engineered for high reliability and ease of teaching, particularly for embedded systems.

This text is regarded as a definitive resource for operating systems courses, particularly due to its unique approach of integrating theoretical principles with a concrete, working example in MINIX 3. The revision for MINIX 3 ensures its continued relevance for understanding modern operating system design, especially for applications requiring high reliability and embedded systems. Its structure, which first explains concepts and then demonstrates them, makes it an effective tool for both students and practicing professionals seeking a comprehensive understanding of operating system internals.