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Requests to identify a peripheral device (printer, monitor, input device, etc.) based on a photograph or some specific criteria.

11 votes

Denys Fisher, of Spirograph fame, using a computer late 1976, early 1977

The pen plotter appears to be an HP 7221 or 9872. They look identical but differ in their interfacing: the 7221 is the RS-232 version and does not speak HP-GL; the 9872 uses HP-IB and HP-GL. If the co …
John Dallman's user avatar
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