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Casio Scientific Calculator: owned since 1999, used through high school years 8 - 12, a degree in accounting, my current workhorse in my underwriting job. Maybe my favourite possession. : r/BuyItForLife
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CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products - Amazon.com
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Amazon.com : FX-115ESPLUS Casio FX115ESPLUS Scientific Calculator Black 1-Pack 1 : Calculadora Cientifica Casio : Office Products
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