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
Calculator Texas Instrument TI-30X TI-30 STAT, Casio FX-260SOLAR WORKING 5 Lot | eBay
TABLÓN DE ANUNCIOS - CALCULADORA CASIO fx-4000P SCIENTIFIC CALCULATOR CASIO fx 4000 P - FUNCIONANDO A