File:Casio FX-100 College, scientific calculator for use in schools, 1980s.jpg
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![File:Casio FX-100 College, scientific calculator for use in schools, 1980s.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Casio_FX-100_College%2C_scientific_calculator_for_use_in_schools%2C_1980s.jpg/355px-Casio_FX-100_College%2C_scientific_calculator_for_use_in_schools%2C_1980s.jpg?20221219183746)
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