A milling machine is a versatile tool used in manufacturing to shape and cut materials, primarily metals. It operates by rotating a cutting tool against a stationary workpiece, allowing for precise removal of material. This process can create various shapes, including flat surfaces, grooves, and complex contours, making it essential in industries like automotive and aerospace. Milling machines come in different types, such as vertical and horizontal, each suited for specific tasks. They can be operated manually or controlled by computer programs, known as CNC (Computer Numerical Control), which enhances accuracy and efficiency. This technology has revolutionized how parts are produced, leading to faster and more reliable manufacturing processes.