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Amazon.com : Casio fx-300ES PLUS Scientific Calculator; SAT Compatible; Natural Textbook Display; Math, Trigonometry, Statistics, Algebra, Geometry and Physics Functions; Comes with Slide-on Hard Case; Black : Office Products
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File:Vintage Casio Model AS-80 Electronic Desktop Calculator, Battery or AC Operation, Made In Japan, Circa 1971 (14551050788).jpg - Wikimedia Commons
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