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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.
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.
My mill grinds
pepper and spice
Your mill grinds
rats and mice