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calculator was invented in Japan in 1970 Answers - CodyCrossAnswers.org
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The History of Calculators in Japan - YouTube
Vintage S-120 Calculator (Made in Japan), Hobbies & Toys, Memorabilia & Collectibles, Vintage Collectibles on Carousell
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World of Engineering on Twitter: "Historic invention of the day: 1970: The pocket calculator is invented in Japan. Image credit: Mister rf https://t.co/DOK6FZ76ta" / Twitter
Handheld Electronic Calculator Prototype - Texas Instruments Cal Tech | National Museum of American History
Adler EC 60 Handheld Electronic Calculator | National Museum of American History
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Japanese Girl Operates Calculator At Speed Of 9 Hits Per Second! Video Is Jaw Dropping! - RVCJ Media
1980s Sharp EL-545H Solar Scientific Calculator 10 Digits w Case Japan - Vinty
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Calculator - Wikipedia
File:Vintage Sanyo Model CX2750 Amorphous Solar Battery Electronic Pocket Calculator, Made In Japan, Circa 1985 (16141629565).jpg - Wikimedia Commons