Pretty interesting, though I disagree with the videos on www.engineerguy.com that Selectric was a digital to analog converter. It converted a digital signal - a

Pretty interesting, though I disagree with the videos on www.engineerguy.com that Selectric was a digital to analog converter. It converted a digital signal - a key pressed - into a digital output - a glyph printed, though tilt and turn take specific values from continuous range.