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Scientific Formula128: fx-1000F/fx-5000F. Owner's Manual by Casio: Very Good Trade Paperback | Robinson Street Books, IOBA
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The Casio FX-850p Pocket Computer circa 1987, upgraded to 16k so that you can compute anything anywhere anytime! (portable week) : r/retrobattlestations
Casio FX-6000G, FX-6500G Owner's Manual : Nohoval Turrets : Free Download, Borrow, and Streaming : Internet Archive
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