Men’s minds were too valuable to waste on tasks that a few thousand transistors, some photoelectric cells, and a cubic metre of printed circuits could perform.
There are no more uses of "transistor" in the book.
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Today, most transistors are embedded in integrated circuits.
I looked away for a second to blink them off, and Go said, "So I needed a triple-A battery, which, as it turns out, is different from a transistor battery, so I had to find the receipt to return the transistor battery …."