Many of the machines in Computer History Museum are old enough to be made from vacuum tubes. Here are a few of them; there are many more.

ENIAC
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I forgot what this one was (I was foolish enough to not take notes).

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Johnniac
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Whirlwind I

This machine is, of course, very important to a DEC nut like me.

WISC
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SAGE

Internet rumor has it that the last SAGE was taken off-line in 1983. By then, they had to buy replacement tubes from Czechoslovakia, which was part of the Evil Empire. Sage is so cool, I've made larger 3D pictures for you here.

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