Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. APT or Automatically Programmed Tool is a high-level computer programming language used to generate instructions for numerically controlled machine tools. Douglas T. Ross is considered by many to be the father of APT. APT is a language and system that makes numerically controlled manufacturing possible. This early language was used widely into the 1970s and is still a standard internationally.APT is used to program CNC machine tools to create complex parts using a cutting tool moving in space. It is used to calculate a point-to-point path that a tool must follow to generate a desired form. APT is a CAM system based on a special-purpose language. It was created and refined during the late 1950s and early 1960s to simplify the task of calculating geometry points that a tool must traverse in space to cut the increasingly complex parts required in the aerospace industry.

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