Along with subsequent computers that also used vacuum tubes, ENIAC was known as a first-generation computer. ENIAC could execute up to 5,000 additions per second, multiple orders of magnitude ...

(The vacuum tube-powered ENIAC, for example ... engineers from Bell Labs built the first computer without vacuum tubes. Known as TRADIC (for TRAnsistorized DIgital Computer), the machine was ...

When I first got ... designers used tubes and were blazing new ground. Part of what makes the ENIAC so different is that it had a different design principle than a modern computer.

ENIAC, the mammoth machine credited with helping to start the computer age ... attention when he announced in 1942 that he thought vacuum tubes could be used to speed up the mechanical calculators ...