Abacus & computer printout. View of an abacus on a computer printout of numbers. The abacus was an early form of arithmetic calculator. Its name is derived from a method of counting using stones on a 'flat surface' (=abacus,Latin) familiar to the ancient Greeks and Romans. The modern abacus consists of beads on a frame,known as a soroban in Japan and a shchoty in Russia. Experienced users may perform calculations faster than by using an electronic calculator,but the technique needs practice | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Terry, Sheila |
Taille de l’image : | 2872 px × 3543 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |