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* 1973: PDS-4 introduced. It ran twice as fast and displayed twice as much text or graphics without flicker. Its display processor supported instantaneous interactive magnification with clipping. It had an optional floating point add-on.
* 1974: PDS-1G introduced.
* 1977: A total of about 700 PDS-4 systems had been sold in the US. They were built upon order rather than being mass-produced.
* 1978: Dynagraphic 3205, 6210, and 6220 introduced. They were designed to be used mainly by a proprietary

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