In Japan, a Visit to the Casio G-Shock Factory - The New York Times
Casio - Wikipedia
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Casio Personal Mini Handheld Electronic Calculator | National Museum of American History
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Casio AS-C
Casio FX-700P Handheld Electronic Calculator | National Museum of American History
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CASIO US Official Website | CASIO
Casio Memory A-1 Handheld Electronic Calculator | National Museum of American History
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Casio Pocket-Mini Handheld Electronic Calculator | National Museum of American History
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The Casio Secret Sender was the original messaging gadget | Mashable
Electronic Musical Instruments | CASIO
Casio - Wikipedia
CASIO US Official Website | CASIO
