casio calculators

here are some of the earlier casio models with vacuum fluorescent displays (green screens). 

see also casio lcd calculators, simple calculators, desk calculators and pocket computers

casio al-8 casio al-8s casio al-10 casio fx-10
casio fx-19 casio fx-20 casio fx-29 casio fx-39
casio fx-101 casio fx-201p casio fx-202p casio pro fx-1
boots 425 casio fx-110 casio fx-120  
casio st-1 casio cq-1 casio cq-2