80's Japanese electronics were way ahead, my dad had one casio FX-602p calculator, I think still we have that one at home. It had an interface on the top and yo

80's Japanese electronics were way ahead, my dad had one casio FX-602p calculator, I think still we have that one at home. It had an interface on the top and you could attach the calculator to a box like device and that device had 3 audio outputs. Then you can plug those audio jacks into a cassette player to save and load programs. btw, the word "seiko" means "starchild"