Enormous dimensions, complicated military calculations, and thousands of vacuum tubes—this was the early supercomputer.

There’s a Blue Bendix in Texas, and thanks to [Usagi Electric] it’s the oldest operating computer in North America. The Bendix G-15, a vacuum tube computer originally released in 1956 ...

Culminating a year-long project, [Usagi Electric] aka [David] has just wrapped up his single-bit vacuum tube computer. It is based on the Motorola MC14500 1-bit industrial controller, but since ...

If transistors could replace vacuum tubes in the phone system, then they certainly could replace them in computers too. The army, with its need for ever-faster and more efficient calculations ...

ENIAC stands for Electronic Numerical Integrator and Computer. John Mauchly and J ... when he announced in 1942 that he thought vacuum tubes could be used to speed up the mechanical calculators ...

While the first computers were mechanical and famously ran on vacuum tubes, there were other schools of thought that introduced a different kind of computer – one that ran on water. In the 1930s ...