Keys to the Sciences (Maqālīd al-ʿUlūm) is a scholarly compendium that systematically defines and explains technical terms from 21 diverse fields of knowledge, including theology, philosophy, jurisprudence, logic, astronomy, medicine, and music. Dedicated to the Muzaffarid ruler Shāh Shujāʿ, this 14th-century work reflects the intellectual vibrancy of medieval Persia, where scholars engaged in interdisciplinary discourse.

Compiled from oral teachings, scholarly debates, and widely respected academic texts, it serves as both a reference guide and a foundational learning tool. This critical edition, prepared by renowned scholars Gholamreza Dadkhah and Reza Pourjavady, offers modern readers an invaluable glimpse into the rich traditions of Islamic intellectual history, making it an essential resource for students, researchers, and anyone interested in classical Islamic sciences.

All those interested in the history of science in the Islamicate world, as well as anyone concerned with the terminology of religious, literary, and rational sciences in Arabic, will find this work indispensable.