Comparing old and new ways of calculating. On the left are beads of an abacus,on the right is a cell phone showing it's calculator function | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source |
Bildgröße: | 5184 px × 3456 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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