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abaci

General Crossword Questions for “abaci”

Counting devices

On which adders slide to and fro?

Counters where sailor just fails to get acid

Simplistic adding machines

Encyclopedia

Liber Abaci (1202, also spelled as Liber Abbaci) is a historic book on arithmetic by Leonardo of Pisa, known later by his nickname Fibonacci. Liber Abaci was among the first Western books to describe Arabic numerals, the first being the Codex Vigilanus completed in 976; another pivotal work. — “Liber Abaci - Wikipedia, the free encyclopedia”, en.wikipedia.org

The abacus, also called a counting frame, is a calculating tool used primarily in parts Today, abacuses are often constructed as a bamboo frame with beads. — “Abacus - Wikipedia, the free encyclopedia”, en.wikipedia.org

There is a link to Liber abaci at Wikisource in the "External links" Since a large part of the text of Liber Abaci is devoted to explaining, in horrendous detail, the very same. — “Talk:Liber Abaci - Wikipedia, the free encyclopedia”, en.wikipedia.org

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