Noun
The word is derived from abacus
of Abacus
Source: Webster's dictionaryAlthough the Codex Vigilanus described an early form of Arabic numerals (omitting 0) by 976 AD, Fibonacci was primarily responsible for spreading their use throughout Europe after the publication of his book Liber Abaci in 1202. Source: Internet
Binary abacus Two binary abaci constructed by Dr. Robert C. Good, Jr., made from two Chinese abaci The binary abacus is used to explain how computers manipulate numbers. Source: Internet
In 1202, he completed the Liber Abaci (Book of Abacus or Book of Calculation) which popularized Hindu–Arabic numerals in Europe. Source: Internet
Liber Abaci (1202) A page of Fibonacci's Liber Abaci from the Biblioteca Nazionale di Firenze showing (in box on right) the Fibonacci sequence with the position in the sequence labeled in Roman numerals and the value in Hindu-Arabic numerals. Source: Internet
Leonardo wrote Liber Abaci in 1202 (updated in 1254) introducing the technique to Europe and beginning a long period of popularizing it. Source: Internet