Amazon.com description: Product Description: Now in a newly updated and expanded fourth edition, our most popular CNC programming book continues to provide readers with an excellent foundation in programming codes and syntax. Programs represented in the book are not as complex as those found in Industry. However, they have been deliberately engineered to provide readers with demonstrations of basic concepts of CNC programming that they can learn from and apply to a variety of industrial situations. Comprehensive in scope, the book features detailed discussion of two-axis and three-axis programming, basic trigonometry, and advanced CNC concepts such as mirror imagery, polar rotation, and helical interpolation. A comprehensive glossary is also included for the benefit of readers who may be new to the CNC programming world.