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Calculators, anyone? My trusty FX-115s. Actually had to change the battery recently, after about 20 years of use. : r/casio
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Casio - fx-115S - - Scientific calculator - Casio fx115S - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
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Casio fx 115ES PLUS Natural V.P.A.M. 2nd Edition Scientific Calculator White FX 115ESPLS2 S - Office Depot
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