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The ten Arabic numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are the most commonly used symbols for writing numbers. The term often also implies a positional notation using the numerals, as well as the use of a decimal base, in particular when contrasted with other systems such as Roman numerals. However, the symbols are also used to write numbers in other bases such as octal, as well as for writing non-numerical information such as trademarks or license plate identifiers.
They are also called Western Arabic numerals, Ghubār numerals, Hindu–Arabic numerals,[1] Western digits, Latin digits, or European digits.[2] The Oxford English Dictionary uses lowercase Arabic numerals, and the fully capitalized term Arabic Numerals for the Eastern Arabic numerals.[3] The term numbers or numerals or digits often implies only these symbols, however this can only be inferred from context.
Europeans first learned of Arabic numerals c. the 10th century, though their spread was a gradual process. Two centuries later, the Italian scholar Fibonacci encountered the numerals in the Algerian city of Béjaïa. His 13th-century work Liber Abaci was crucial in making them known throughout Europe; however, their use in Europe was largely confined to Northern Italy until the invention of the printing press in the 15th century.[4] European trade, books, and colonialism subsequently helped popularize the adoption of Arabic numerals around the world. The numerals are used worldwide—significantly beyond the contemporary spread of the Latin alphabet—and have become common in the writing systems where other numeral systems existed previously, such as Chinese and Japanese numerals.
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