27 oct 1964 año - DAC-1 is publicly unveiled at the Fall Joint Computer Convention

Descripción:

- built by IBM and GM
- sometimes considered the first CAD system
- introduced transformations on geometric objects for display, including rotation and zoom, and a no-display (later called “clipping“) function
- read coordinate voltages from a conductive transparent sheet that was positioned over the IBM Alpine display head
- when collaboration on the design drawing was desired, the operator could select a view which would be displayed on an auxiliary CRT film recorder, and it would be scanned and quickly processed, and could then be projected onto the screen
- also could input drawings from other sources, such as traditional hand drawings, using a computer controlled film reader

- resulted in the development by IBM of the workhorse IBM 2250 graphics display, which was the interface with the IBM 1130 and 360 mainframes, and which was one of the most commonly used graphics displays of the 1960s and early 1970s

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