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Before transistors there were vacuum tubes which did the same thing but using very different principles (and were also way bigger, even than traditional transistors and billions of times more than the transistors in the most modern ICs)
Before electric milling or even steam milling, flour used to be milled using watermills and windmills which, IMHO, are way cooler.
I love seeing old workshops where all of the machines are powered off of a single source of rotational energy. Just so whimsical and kinetic when everything is moving
a 127mm vacuum tube, quite large, is equivalent to 127,000,000 nm which is only 63.5 million times bigger than a cutting edge transistor so that estimate seems a little exaggerated.
That's just the length, if you are comparing volumes it's an under estimate.
Thats fair I suppose.
I was too tired to go beyond "1nm = 10^-9^ hence 1 billion" and actually do the maths ;)
My mill grinds
pepper and spice
Your mill grinds
rats and mice
Are you singing at your cat?
Well, cats as a bit more on the slicey and dicey than on the grindey side of breaking up things.
(One shudders to think on what cats would do if they could actually use knifes)
Steam millers sound way cooler than windmills