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Vacuum-tube computers, now called first-generation computers, [1] are programmable digital computers using vacuum-tube logic circuitry. They were preceded by systems using electromechanical relays and followed by systems built from discrete transistors. Some later computers on the list had both vacuum tubes and transistors.
A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. While the history of mechanical aids to computation goes back centuries, if not millennia, the history of vacuum tube computers is confined to the middle of the 20th century. Lee De Forest invented the triode in 1906.
Pages in category "Vacuum tube computers" The following 69 pages are in this category, out of 69 total. This list may not reflect recent changes. ...
The list is organized by operational date or delivery year to customers. Computers announced, but never completed, are not included. Some very early "transistor" computers may still have included vacuum tubes in the power supply or for auxiliary functions.
Although RCA was noted for their pioneering work in transistors, RCA decided to build a vacuum tube computer instead of a transistorized computer. [1] It was the largest vacuum tube computer of its time in 1956, occupying 20,000 sq ft (1,900 m 2 ) of floor space with up to 30,000 tubes, 70,000 diodes , and 35,000 magnetic cores . [ 2 ]
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
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Valves (vacuum tubes) seen on end in a recreation of the Colossus computer. Colossus was developed for the "Newmanry", [31] the section headed by the mathematician Max Newman that was responsible for machine methods against the twelve-rotor Lorenz SZ40/42 on-line teleprinter cipher machine (code-named Tunny, for tunafish).