Abacus

Abacus: The Art of Calculating with Beads 0/5 1 2 3 4 5 An extensive site on the abacus, including its history and an interactive Java-based abacus. Visit Website Details Rate Report Comments	How to Use an Abacus 0/5 1 2 3 4 5 Visit Website Details Rate Report Comments
Introducing the Abacus 0/5 1 2 3 4 5 Visit Website Details Rate Report Comments

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Last listing added: 01/25/05