Relative to numbers, to Indo-Arabic numerals. The origin of the name has a very long history, it comes indirectly from the Persian region of Khorasmia or Khorasmia, where the mathematician known as al-Khwarizmi ("the khorasmio, the khorasmite") was born, which in medieval Latin ended up as eponymous for algorismus ("algorithm"), and at some point lost the article to become 'guarismo'.
