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ical control systems that could handle the volume and repeatability. The first contract was awarded to the Parsons Corporation of Michigan, which then subcontracted development of a servo system for the machine tool to the Servomechanism Laboratory at MIT《 NC Technology 》 E- mail: The Servo Mechanism laboratory at MIT《 NC Technology 》 E- mail: The evolution of NCvThe specific goals of developing NC: production the quality and accuracy of manufactured parts manufacturing costs and assemble plex parts quickly《 NC Technology 》 E- mail: The first NC machine producingidentical parts《 NC Technology 》 E- mail: The evolution of NC? By 1960, NC was widely accepted and readily available.? The majority of these first generation NC machine tools required coded paper tape to run.? The engineers would generate NC code on their puters, then encode long strips of paper tape by punching hole patterns in them.? Later, the use of “manreadable” solved this problem《 NC Technology 》 E- mail: An early NC paper tape reader《 NC Technology 》 E- mail: CNCDirect numerical control and distributed numerical control (DNC) describe munications to a machine tool from a remote puter.《 NC Technology 》 E- mail: APT? From 1955 to 1960, MIT also developed a puterassisted programming system called automatically programmed tools (APT). This programming language was developed to ease the task of plicated threeaxis programming, mainly in the aerospace industry. APT uses Englishlike words to describe the geometry and the tool motions on a part program.《 NC Technology 》 E- mail: MICROCOMPUTER TECHNOLOGY? The modern puter is an electronic machine that performs