In 1974, HP came out with their first programmable calculator, the HP-65 ... getting daily use while a Casio fx-3600P that I’d thought I’d lost but later found, sits waiting for its turn ...
One such programmable calculator, a Casio PRO fx-1 with magnetic card storage, came across [amen]’s bench recently. Sadly, it didn’t come with any cards, so [amen] reverse engineered the card ...
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