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What was the first calculator with R-P and P-R keys?
04-22-2022, 08:23 AM
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What was the first calculator with R-P and P-R keys?
Long time no visit.
I'm doing video on complex numbers and wondered what was the first calulator (any brand) that had R-P and P-R keys for complex number format conversion?
I included an image of an original Casio FX-82, but there has to be eariler ones.

Thanks.
Dave.
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What was the first calculator with R-P and P-R keys? - EEVblog - 04-22-2022 08:23 AM



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