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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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15 jun 1967 ano - 1967 - An engineer at Texas Instruments begins work on the first handheld calculator.
Adicionado na linha do tempo:
Calculator history
By
Casey
4 out 2017
0
0
499
Data:
15 jun 1967 ano
Agora
~ 56 years ago
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