The Inventor Of Early Abacus Was Napier Bones.
charles babage
Arabs
Napier's Bone
The founders name is HOCKUS POCKUS!!
China invented the abacus .
ABACUS
disadvantage of abacus
How did the abacus occur?
An Abacus has beads and strings.
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 abacus II!
the Chinese invented the abacus