 Avempace himself tells us how these sciences are organized. He followed other Andalusians in turning to Abu Nasr al-Farabi, Alfarabi (d. ca. 950), for instruction in logic and in classifying the sciences. Alfarabi is the author of a treatise “enumerating” the sciences (Farabi 1952) and some books of the introductory genre: Epistle with which the book on logic begins (Dunlop 1957a), Sections containing all what needs the beginner in logic (Dunlop 1955), and the Book of the Eisagoge or Introduction (Dunlop 1956).