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A lot of these answers talk about how colors and shapes can mean different things based on region. But if it's a standard schema across all robots, then that doesn't matter as much, because people...
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#1: Attribution notice removed
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System
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2021-03-30T23:53:19Z (over 3 years ago)
Source: https://worldbuilding.stackexchange.com/a/80673 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/