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HP-12c Platinum (feddit.uk)

submitted 2 months ago by [email protected] to c/[email protected]

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HP's most accurate financial calculator, oddly enough, and despite only returning the ceiling of solve-for-n.

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[–] millifoo 4 points 2 months ago (1 children)

As a surveyor, he probably had an 11c or 15c (the 12c is the financial version of the Voyager series).

Aside: Swissmicro sells a series of voyager clones with modern hardware:

More info on the original HP calcs:

[–] [email protected] 2 points 2 months ago

I looked at an image of the 11c, that was it for sure.