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About frist scientific calculator powered by solar cells and button cells
08-17-2017, 02:55 PM (This post was last modified: 08-17-2017 02:57 PM by Thomas Ritschel.)
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Thomas Ritschel Offline
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RE: About frist scientific calculator powered by solar cells and button cells
The first solar-powered programmable calculator might have been the Casio fx-50F, introduced in 1987.
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RE: About frist scientific calculator powered by solar cells and button cells - Thomas Ritschel - 08-17-2017 02:55 PM



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