Here's a neat paper about Boeing's use of CAD and CAM in the 50s and 60s. I particularly like the story about their first computer-made part drawings. There wer

Here's a neat paper about Boeing's use of CAD and CAM in the 50s and 60s. I particularly like the story about their first computer-made part drawings. There were no printers, and plotters were too inaccurate; but they had CNC mills and they realized "if you can cut in three dimensions, you can certainly scratch in two." So Boeing's first computer-made part drawings were engraved on sheets of aluminum. https://inria.hal.science/hal-01526813v1/document https://inria.hal.science/hal-01526813v1/document