Prof. Abel Méndez 🔭 🔬 on X: "My high school student calculator, a CASIO FX -4000P, and my university professor calculator, a TI-Nspire CX II CAS. 35 years apart. 🙂 https://t.co/9bq6sk6zLZ" / X
Guy Leech on X: "It lives! This @Casio fx-4000P programmable calculator was bought for me by my late Dad's company as payment for writing some software (in compiled BASIC) for them whilst
Vintage Casio fx-4000P Scientific Programmable Calculator With Manual Book | eBay
MyCalcDB : Calculator Casio fx-4000P
CASIO FX-4000P CALCULATOR. VINTAGE 1985. | eBay
Casio calculator FX-4000P (nº 117) | Calculator, Casio, Things to come