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