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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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15 jun 1967 año - 1967 - An engineer at Texas Instruments begins work on the first handheld calculator.
Añadido al timeline:
Calculator history
By
Casey
4 oct 2017
0
0
684
fecha:
15 jun 1967 año
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~ 58 years ago
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