Arabic numerals
The first mentions of the numerals in the West are found in the "Codex Vigilanus" of 976.
Arabic parts
Beginning in the tenth century, many Arabic manuscripts were translated into Latin, becoming the means by which Classical astrology found its way back to Europe. Medieval astrologers, most notably the major 13th-century Italian, Guido Bonatti, a contemporary of Dante, assumed it was the Arabs who originated the concept of the lots, and hence they came eventually to be called the "Arabic parts".