From Raw Cutting Toward Precision Machining builds on the author’s earlier book, Versatility of Waterjet Technology, and chronicles the evolution of waterjet machining—from crude cutting to a high-precision manufacturing process. Spanning five decades of innovation, it highlights the people, ideas, and milestones that shaped this versatile technology. At its core, the book honors Dr John Olsen, whose pioneering work in high-pressure waterjets laid the foundation for transformative advances. Several chapters explore his pivotal role, including the development of compact, affordable systems for precision and micro-machining. The Pacific Northwest’s leadership in high-pressure hardware, intelligent control software, and abrasive waterjet systems is also featured prominently. In addition to technical breakthroughs, the book examines how marketing, education, and collaboration helped transform waterjets from niche equipment into essential global manufacturing tools. Blending historical insight, technical depth, and personal reflection, this is essential reading for engineers, educators, and anyone curious about the evolution of the manufacturing technology.