| 1. | The Armenian people also used abaci similar to the Russian schoty.
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| 2. | Before Renaissance, they were various types of abaci.
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| 3. | It was introduced to Europe in 1202 in Fibonacci's Liber Abaci.
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| 4. | Abaci of a more modern design are still used as calculation tools today.
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| 5. | Abaci, of a more modern design, are still used as calculation tools today.
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| 6. | When contestants'race through problems, their fingers skitter across ghost abaci lying on the table.
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| 7. | The soroban is also the basis for two kinds of abaci developed for the use of blind people.
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| 8. | Decimal computation was carried out in ancient times in many ways, typically in rod calculus, with abaci.
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| 9. | Heriger is also the author of an arithmetical work entitled " Regul?de numerorum abaci rationibus ".
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| 10. | The book included information taken from the 1202 " Liber Abaci ", such as lattice multiplication.
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