The WinPCNC is a one-computer NC system, based on the mighty platform of the personal computer with the operating system Windows NT and VentureCom 4.1 real time extension. It belongs to the PCNC class, that is Personal Computer Numerical Control. This class of personal control systems is considered now to be the most perspective class of new-generation systems. He system uses the only processor, providing all necessary functions, including cycle logic. The hardware is submitted by the apparatus of the personal computer with additional interface modules for connections with servo-drives, spindle units, cycle-logic drives and the operator panel. All these devices are available today at the computer market; consequently, there is no necessity to organize some special production of numerical control systems.