That may be but they originated in manufacturing, long before NOCs were a thing. | Hacker News

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		bongodongobob on Oct 14, 2024 \| parent \| context \| favorite \| on: Busy Status Bar That may be but they originated in manufacturing, long before NOCs were a thing.

cdfuller on Oct 14, 2024 [–]

Andon lights!

https://en.wikipedia.org/wiki/Stack_light

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