Casio fx-82TL , fx-83WA , fx-85W , fx-85WA , fx-270W PLUS , fx-300W , fx-350TL , fx-911W - User's Guide : Casio : Free Download, Borrow, and Streaming : Internet Archive
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10-digit Scientific Calculator with 240 Functions and 2-Line Screen Multi-purpose Portable Student Calculator for Math Teaching - AliExpress
Casio Scientific Calculator fx-82ES user manual : Free Download, Borrow, and Streaming : Internet Archive
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Other apparatus - Vintage Electronic Pocket SCIENTIFIC Calculator CASIO FRACTION BEST VIEW FX-82LB CALCULATRICE TASCHENRECHNER Kalkulator
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