Actually called Hindu-Arabic Numerals
, this is the system we use today, consisting of 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. Developed around 600AD in India
, it was popularized in Europe
, and consequentially in the Western world
, by Fibonacci
's book Liber Abaci
Despite the name, those numerals are not to be confused with:
- Arabic (Unicode calls those Arabic-Indic digits). While forming the same decimal system with a zero sign, Arabs commonly use differently-shaped digits. The Arabic digits are shaped similary to the Arabic letters, and are written right-to-left, just as the Arabic text. That makes their right-to-left language a bit easier. From zero to nine, here they are: ٠ ١ ٢ ٣ ٤ ٥ ٦ ٧ ٨ ٩ (presented in Unicode, and right to left if your browser is smart enough).
- Devanagari (Hindu) digits. Also ranging from 0 to 9, those are written as: ० १ २ ३ ४ ५ ६ ७ ८ ९
References: The Unicode Consortium's code charts for information on Devanagari.