COMPUTERS; COMPUTER SOFTWARE FOR COMPUTER AIDED MANUFACTURE AND THE CONTROL OF MANUFACTURING SYSTEMS; MANUFACTURING CONTROL SYSTEMS COMPRISING COMPUTERS, COMPUTER SOFTWARE FOR USE IN COMPUTER AIDED MANUFACTURING AND DESIGN APPLICATIONS, AND MACHINE TOOL CONTROLLERS; SYSTEMS FOR DIRECT NUMERICAL CONTROL OF MACHINE TOOLS COMPRISING COMPUTERS AND COMPUTER SOFTWARE FOR COMMUNICATIONS SYSTEMS, MACHINE INTERFACE, AND SIMULATION AND FEEDBACK SYSTEMS APPLICATIONS; MACHINE TOOL CONTROLLERS; MACHINE IN...