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Casio 9850 series - Wikipedia
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The very first Graphing Calculator with a Color Display – CASIO CFX 9850 Review — Wenting's Web Page
Casio 9850 series - Wikipedia
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Inside the Casio CFX-9850G Graphing Calculator - YouTube
Saturday watch here, Casio made some great lines of timepieces, but the calculator watches are probably the most recognized, this one is the Casio CFX-400! Capable of normal timekeeping, it was a