Is one’s complement a real-world issue, or just a historical one?

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I work in the telemetry field and we have some of our customers have old analog-to-digital converters that still use 1’s complement. I just had to write code the other day to convert from 1’s complement to 2’s complement in order to compensate.

So yes, it’s still out there (but you’re not going to run into it very often).

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