Guy Leech en 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 I was a student. 1985 or thereabouts https://t.co ...
fx-4000P Owner's Manual: Casio: Books - Amazon
Taschenrechner Uni Abi etc. CASIO fx-4000p alt aber gut in Nordrhein-Westfalen - Düren | eBay Kleinanzeigen