In the course of the third millennium BC a tribe in the valley of the Indus river, more specifically the te Harappâ and te Mohenjo-Daro, invented a kind of pictographic script, mainly portrayed on stone seals and copper plates. This script consisted of a few hundred characters. The characters often denote human beings or parts of their body, animals, plants, etc. The direction of the script is usually from right to left. The inscriptions that have been found on around 800 seals, seem to denote proper names.