Page "Abacus" Paragraph 6

The use of the abacus in Ancient Egypt is mentioned by the Greek historian Herodotus, who writes that the Egyptians manipulated the pebbles from right to left, opposite in direction to the Greek left-to-right method.

Archaeologists have found ancient disks of various sizes that are thought to have been used as counters.

However, wall depictions of this instrument have not been discovered, casting some doubt over the extent to which this instrument was used.