Concept: Numerical control (NC) is the automated control of machining tools systems require motor drives to control both the position and the velocity of the machine axes. Each axis must be driven separately and follow the command signal generated by the NC control. There are two ways to activate the servo drives: the open-loop system and the closed-loop system. Papers, tapes, floppy tapes and cassettes etc. is a small magnet; additionally acts as a storage device for CNC inputs. It is used to transfer the data from one place to the other place. Post processor is used in CNC machines only & not in NC machines. A post processor is a unique driver not a hardware specific to a CNC machine, Robot or mechanism. The digitizer is an operator input device, which contains a large, smooth board & an electronic tracking device, which can be changed over the surface to follow existing lines. The electronic tracking device contains a switch for the user to record the desire x & y coordinate positions.