Rhodri Marsden on Twitter: "Let's hear it for the Casio fx-85 solar powered calculator, just discovered in a box in the loft and still working perfectly 35 years after it was bought.
Casio Fx-82a Taschenrechner Schule Studium Calculator in Nordrhein-Westfalen - Wesel | Büromöbel gebraucht kaufen | eBay Kleinanzeigen
Vintage Casio fx-82a Scientific Calculator Tested & Working | eBay
Using Statistic Mode on the Casio fx 82 AU - YouTube
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Virtual Museum of Calculators
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CASIO fx -82A U PLU S
Vintage Casio fx-82A Scientific Calculator with Manual and Slip Case | #1777816582