GE Differential Analyzer

A precursor to modern computing, this was an analogue, mechanical computer.

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Earth vs the Flying Saucers (1956)

The differential analyzer is used to translate intercepted alien messages and learn of their plot to invade.

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Importance: ****
Realism: *
Such a task is way beyond the capabilities of this machine, and the robotic handwriting output device is particularly amusing.

Visibility: ****