CNC milling machines are advanced tools used in manufacturing to shape and cut materials like metal, wood, and plastic. The term "CNC" stands for "Computer Numerical Control," which means these machines are operated by a computer program that directs their movements with high precision. This allows for complex designs to be created efficiently and accurately. These machines use rotating cutting tools to remove material from a workpiece, creating the desired shape. CNC milling is widely used in various industries, including automotive, aerospace, and electronics, due to its ability to produce intricate parts with minimal human intervention.