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Vintage Texas Instruments TI-1250 basic electronic math calculator introduced in 1975 on an old wooden desk Stock Photo - Alamy
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File:Vintage Texas Instruments TI Business Analyst Pocket LED Calculator, Made in the USA, the First in a Long Line of Popular Financial Calculators, Circa 1976 (9271798342).jpg - Wikimedia Commons
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Vintage Texas Instruments Business Analyst - I Pocket LED Calculator, Made in USA, A Common TI Calculator, Circa 1979 | Old calculator, Computer history, Calculator
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File:Vintage Texas Instruments Model SR-10 Pocket LED Calculator, First of a Line of TI "Slide Rule" Models, Sealed Battery, Price - 149.95 USD, Circa 1972 (9304906070).jpg - Wikimedia Commons
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