43s status

[sa-penguin]

The simple QWERTY keyboard has variations for international use. Even in the "english" layout, there are variations - like Dvorak.
For something as personal as a calculator, provided the physical keycaps are all the same size / shape, it's just a matter of rearranging a lookup table to have any setup you like.
The old 41 series let you add an overlay, which covered the labelling on the faceplate. If you combine that with a case that lets you replace keycaps, you can have any setup you want.

You want numbers up the top? Open the case, move the keycaps, edit the keymap file, and you're done.

You wish to add or change 2nd functions of a given button? Then you need to order or make custom keycaps. Good luck with that: I think the text will need to be engraved, then filled with yellow paint.

This concept has ben raised before, in one of these threads.