IBM 1627
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A Calcomp plotter, model 565, sold by IBM for use with the IBM 1620, and, later, the IBM 1130 computers. It became perhaps the first non-IBM peripheral that IBM allowed to be attached to one of its computers.
The standard size fed a roll of 11-inch-wide paper with perforated edges over a drum. The drum could move the paper forward and backward. A pen holder slid horizontally over the paper. Both the drum and the pen holder were controlled by stepper motors. Commands included moving the drum and pen holder one step in either direction and moving the pen down and up.
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