A modern pocket calculator together with a chinese abacus. The abacus represents one of the first technological approaches to counting and calculating. There are evidences of its use as early as 3000 BC | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 4813 px × 4879 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |