ABSTRACT
ONE AFTERNOON IN 1991 while trying to complete a class assignment in the CAD/CAM Lab, I ran across an illustration in my manual that vividly pictured what I had been struggling to describe—a human inside the machine and a machine inside the human. My assignment had been handed out during the second week of a senior-level undergraduate course in mechanical engineering that introduced students to the technology of computer-aided design and computer-aided manufacturing, or CAD/CAM. With this assignment, we were learning to make two-dimensional drawings with a software program named CADAM, which had been written by engineers at Lockheed, a defense contractor, and purchased by IBM, a computer company, to distribute with its engineering workstations. (See Figure 1.1.) The Human in the Machine and the Machine in the Human https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315022611/c1877128-5b78-41b0-b395-b08d2d8aad37/content/fig1_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
