The document discusses 5-axis CNC machines. It begins with an introduction to CNC machines in general and the operations they perform like milling, drilling, and water jet cutting. It then introduces 5-axis CNC machines, which add two additional rotational axes compared to standard 3-axis machines. This allows for more complex part machining, machining at angles, and greater efficiency. Example applications discussed include manufacturing of turbine blades, custom batch production parts, automotive components, and 3D printing. The document concludes with an overview of programming for 5-axis machines.