Computer Numerical Control, or CNC, is a technology that automates the control of machining tools through computer programming. It allows for precise and repeatable manufacturing processes, making it essential in industries such as aerospace, automotive, and metalworking. CNC machines interpret a computer-aided design (CAD) file and convert it into a series of commands that dictate the movement of tools. This technology enhances efficiency and accuracy, reducing human error and enabling complex designs that would be difficult to achieve manually.