This will help a lot, if you can understand any of it, but you will, don't worry... http://library.thinkquest.org/C005843/english/lessons/less4.swf
China invented the abacus .
ABACUS
How did the abacus occur?
An Abacus has beads and strings.
disadvantage of abacus
The Chinese abacus
the history about the abacus is that 3000 years ago the chinese invented the abacus. The abacus was made of wood parrelel rod and beads.
it is the abacus. :D :D :D i got is dummies
the Chinese invented the abacus
the invenor of the abacus is the invenor of me
The abacus II!
Abacus was invented by the Chinesethe abacus was also known as the first computer