A modern pocket calculator and a sheet of computer paper overshadowed by 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Terry, Sheila |
Taille de l’image : | 4300 px × 4369 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |