The Bre Pettis Collection of Computer Art

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CalComp drum plotters

California Computer Products' drum plotters were the workhorses of early American computer art — sprocket-fed paper, ink pens, and mainframe-driven line work.

CalComp drum plotters
Photo: Ryan Somma, CC BY-SA 2.0, via Wikimedia Commons
Kerry Strand
The Snail, 1967
Charles Mattox
Abstract plotter drawing, 1973