Today almost nobody ’s interested in the lowly vacuum tube except vintage guitar daimon and fan of high - ending stereo equipment . Back in the early L , they “ thin out through the unknown like a skyrocket through the stratosphere , ” powering everything from TV hardening to other computers . IBM and pioneers of the computer industry have it off them because they were dissolute than electromechanical relays . But tubes also took up a lot of space and throw off a lot of heat — hence the giant size of this other Electronic Calculator .
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