Casio Scientific Calculator fx 991ES PLUS
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Casio Computers is a multinational electronics manufacturing company headquartered in Japan. Its products include calculators, mobile phones, cameras, musical instruments and watches. The mission of Casio's product development is to create something where there was nothing before - what Casio calls going from "0" to "1." By creating totally original products, Casio adds fun and convenience to daily life and pioneers new cultural trends.