He wrote a book on algebra named "Al-Jabr Wal' Muqibla". In this book, he introduced his own number system and also introduced Arabic numerals. His books were translated into Greek and Latin. They named his books "So said Algorizmi". The word "algorithm" is derived from the word Algorizmi. The word algebra comes from the word al-jabr that is at the beginning of the title of the book.