Jason Turner on Twitter: "I'm trying to find the datasheet for the Hitachi HD61747-B27 processor that's in this. Does anyone know how to go about finding this? Google and DuckDuckGo are failing
Casio fx-4000P | A collection of programmable and non-programmable calculators
MyCalcDB : Calculator Casio fx-4000P
fx 4000p - AbeBooks
MyCalcDB : Calculator Casio fx-4000P
Casio fx-4000P : r/calculators
CASIO FX-4000P, USER MANUAL - CASIO - 0 | eBay
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DAN'S CASIO fx-4000P PROGRAMS PAGE
Guia Usuario Casio FX-4000P | PDF
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Calculadora científica Casio fx-4000p de segunda mano por 25 EUR en Majadahonda en WALLAPOP