Abacus. Part of an abacus,an early form of arithmetic calculator. Its name is derived from a method of counting using stones on a flat surface. The modern abacus consists of beads on a frame | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gustoimages |
Bildgröße: | 4758 px × 3674 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |