Guy Leech on Twitter: "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
Calculadora científica Casio Fx-4000p d\'occasion pour 58 EUR in Lugo sur WALLAPOP
DAN'S CASIO fx-4000P PROGRAMS PAGE
Vtg Casio FX-4000P Scientific Calculator Works New Batteries - Loose Faceplate | eBay
CASIO FX-4000P CALCULATOR. VINTAGE 1985. | eBay
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