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File:Vintage Casio Model fx-7000G Scientific Calculator, LCD Dot Matrix Display, Made In Japan, World's First Graphing Calculator Available To The Public, Circa 1985 - 1988 (15810483905).jpg - Wikimedia Commons
Japan: Casio calculators contribute to math education
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File:Vintage Casio Scientific Graphing Pocket Calculator, Model fx-7000GA, Made in Japan, 1990 (8721201872).jpg - Wikimedia Commons
File:Vintage Casio Electronic Pocket Calculator, Model AL-8S, Made In Japan, 8 Digit Fluorescent Display, Circa 1977 (14212804553).jpg - Wikimedia Commons
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