Numerical Control (NC) is a method for mechanically operating a manufacturing machine using code letters, numbers, and special characters. It is less precise and has less computer power than Computer Numerical Control, and it also takes longer to complete a work.
Computer Numerical Control (CNC) is developed by combining the computer with numerical control . The numerical data or information required to create a section or part is delivered to a machine through a software called a part program or Computer Numerical Control.