CNC machining involves the use of computer-controlled manufacturing equipment and tools to execute a variety of complicated production tasks. Three-dimensional cutting tools, lathes, routers, mills, and grinders are examples of common CNC machine types. CNC is an abbreviation for computer numerical control. The technology was invented by John Bushnell Howard in 1955. Computer numerical control (CNC) is a system that controls a machine tool such as a drill or a router with the help of computers. The basic idea behind this technology is to reduce the time required by a human operator to perform repetitive tasks in the factory environment. CNC machines can be divided into three main categories based on the type of motion they produce: rotary, linear, and hybrid. Rotary CNC machines include axes that rotate around fixed points called centers. These machines are commonly used for shaping wood and plastic products that require precise angles. Linear CNC machines include axes that move back and forth along a fixed path called a bed. These machines are typically used for cutting materials such as stone, metal, and glass. Hybrid CNC machines combine aspects of both rotary and linear CNC machines. They are used for producing items with complex shapes that would otherwise need many different types of machinery to manufacture. CNC milling is a method of making fine parts from solid blocks of material by using a series of horizontal cuts made with a rotating cutting tool called a miller.