CNC stands for “Computerized Numerical Control.” It is an automated manufacturing technique that allows for fast, efficient and repetitive cutting, boring, drilling, machining and fabricating of material by computer-controlled devices. Once a particular part has been designed and instructions for machining it have been written, a CNC machine is programmed with those instructions. Raw material is fed into the machine, the setup is completed and the computer automatically does everything else: rotating the part, cutting off various layers, drilling holes to desired depths and more. Identical parts can be machined over and over, with little or no variance.