For your hardware/software history geeks, check this out (and the following ones

https://www.youtube.com/watch?v=WquhaobDqLU&feature=youtu.be&fbclid=IwAR3QCoysVlZKDpia2WEhp_mfXVtUlcALXePMZFVzbKxI4HHAAbDdQ6Di8XE

Interesting…I saved it to watch later when I have more time…

Those are big memory cores 8O the ones I remember threading were microscopic by comparison.