The Hindu-Arabic numeral system is a decimal place-value numeral system that uses a zero glyph as in "205". Its glyphs are descended from the Indian Brahmi numerals. The full system emerged by the 8th to 9th centuries, and is first described in Al-Khwarizmi's On the Calculation with Hindu Numerals, and Al-Kindi's four volume work On the Use of the Indian Numerals . Today the name Hindu-Arabic numerals is usually used.