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Vintage Sharp Electronic Handheld Calculator, Model EL-8, … | Flickr
Tektronix Model 31 Electronic Calculator
Sharp EL-5804 Handheld Electronic Calculator | National Museum of American History
Canon 161 Desktop Calculator
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Electronic Calculators—Handheld | National Museum of American History
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Sharp YO-370 128KB LCD Personal Information Organizer PDA Calculator Electronic | eBay