What Is CNC And What Does Cnc Stand For? CNC stands for Computer Numerical Control. This term can refer to a computer-based system that controls the motion of machine tools (cnc machine) such as lathes and milling machines. In other words, it controls the machine tool’s ability to perform cutting or grinding operations. It can also refer to a system that automatically controls the motion of manufacturing processes using a computer or network of computers (e.g., robot systems). It is a computer-controlled machine that is used to create three-dimensional objects by cutting, routing, and carving materials like wood, plastic, and metal. CNC machines are commonly found in the manufacturing industry because they are capable of producing small and large amounts of parts quickly with high precision.