What abacus is made of
A counting board with movable pebbles or beads.
- Wooden frame — has part. A frame with rods.
- Abacus beads — has part. Movable beads — the places of a number.
- Abacus rods — has part. Guides for the beads.
- Wood — is made of. The counting board was made of wood.
- Stone — is made of. Counting was done with pebbles — the Latin calculus.