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Storage unit from the LEO I computer, 1951 | by Rhysjj
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Storage unit from the LEO I computer, 1951

Copied from the explanatory text:

 

This is one of the last remaining parts of the original Lyons Electronic Office - the first computer built for ordinary business tasks. This storage unit consists of a regeneration chassis and a short mercury delay line. The delay line slowed down, and therefore momentarily stored(?), electronic signals, and the chassis amplified and 'clocked' the signals.

 

More on the Science Museum site, and the book reviewed here gives a great account of LEO.

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Taken on October 10, 2015