These Casio calculators were what we cared about in Portugal, about 40 years ago, TI was nowhere as relevant, and next level would be an HP 48 GX instead.

I started with FX-4500P during high school, and later upgraded to a FX-880P during university, both still working.

By the way, you could get an additional 32 KB for the FX-880P, at a whooping price of 100 euros in today's money adjusted for inflation, talk about RAM prices.

Great work.