What other sci fi technology is being lost on us now? I always that the complexi... | Hacker News

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		whycome 1 day ago \| parent \| context \| favorite \| on: Ask HN: What did you find out or explore today? What other sci fi technology is being lost on us now? I always that the complexity of the local-battery-powered copper-cable telephone exchange system was bonkers. It was the backbone for all our landline calls.

Findecanor 23 hours ago [–]

The telephone system also powered the phone, and often worked when the power grid did not.

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