 Kilwardby adopts a scheme of ordination for the different sciences or disciplines, and it is largely based on the model of Hugh of St. Victor’s Didascalicon: De studii legendi, a widely circulated and immensely influential work from the twelfth century on the classification of sciences (see Silva 2013). As with the work of his (Augustinian) predecessor and notable influence, the DOS had a fame of its own and remains one of the most relevant medieval works of its kind.