WE PROVIDE INFORMATION ABOUT HUMAN CULTURE IN PREHISTORIC TIMES

Abacus - Proto-Nostratic Language

Abacus

Abacuses have been the most used and fastest calculators during the human history.
Yearly calculating-competitions are organized in Japanese schools.

The Incas used cords with knots on them.
Mathematicians counted with them at medieval time
FacebookTwitterEmail

Leave a Reply

Your email address will not be published.

FacebookTwitterEmail