The ABC used regenerative drum memory; The ENIAC used electronic decade counters.
2.
The CMOS 4017 decade counter could be considered a solid-state equilavent of the dekatron.
3.
A control system based on a Moire pattern sensor feeding a semiconductor decade counter was produced but the project failed to achieve the required machining accuracy-resulting in the termination of all electronics design activity in 1960.
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