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This calculator. I'm sure it was around the 80s it was bought
Man Creates Huge Online Museum for Vintage Calculators | WIRED
Electronic Calculators—Desktop | National Museum of American History
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Mechanical calculators: computing without electricity - LOW-TECH MAGAZINE
Busicom LE-120A & LE-120S
Mid-1970s Sharp ELSI 8002 Vintage Calculator Green LED Display
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