query: When was the Arabic numeral system introduced in Europe?
passage: Arabic numerals
The first mentions of the numerals in the West are found in the Codex Vigilanus of 976.[22]
passage: Abjad numerals
Before the introduction of the Hindu–Arabic numeral system, the abjad numbers were used for all mathematical purposes. In modern Arabic, they are primarily used for numbering outlines, items in lists, and points of information. In English, points of information are sometimes referred to as "A", "B", and "C" (or perhaps use Roman numerals: I, II, III, IV), and in Arabic, they are "", then "", then "", not the first three letters of the modern " order.