China invented the abacus .
How did the abacus occur?
The Chinese abacus
An Abacus has beads and strings.
ABACUS
The abacus II!
the Chinese invented the abacus
the invenor of the abacus is the invenor of me
it is the abacus. :D :D :D i got is dummies
Abacus was invented by the Chinesethe abacus was also known as the first computer
the antonym for abacus is future calculator
China invented the Abacus.