• 1969

Hardware Description

The 9120A was a dedicated printer for the 9100 calculator/computer. It was not actually a thermal printer; it was an electrostatic printer (thanks to Steve Leibson for this clarification). HP did not make another electrostatic printer, but did OEM electrostatic plotters from Matsushita in the late 1980s. The 9120A could print 15 characters per line at 150 lines per minute.