Beads
Abacus was invented by the Chinesethe abacus was also known as the first computer
Known as a counting devise, the abacus has been in use for many centuries
it is the abacus. :D :D :D i got is dummies
Abacus
The earliest known written record of the Chinese abacus dates to the 14th century AD.
See the related link for a full answer ...
The china had one with rows wooden round balls on wires, 3 rows of them, 3 balls & 3 balls =6 in the last row, that was add, to subtract it was to the left cool
The abacus is ordinarily attributed to the Chinese, but similar counting devices are known in many different ancient cultures. The system of mathematics used with the Indo-Asian abacus is what set it apart.
China invented the abacus .
Maybe an abacus?
ABACUS