Contents -- Preface -- The Importance of Medieval Commentaries on Aristotle's Categories (Lloyd A. Newton) -- The Medieval Posterity of Simplicius ' Commentary on the Categories: Thomas Aquinas and al-Färäbï (Michael Chase) -- Avicenna The Commentator (Allan Bäck) -- Albertus Magnus On the Subject of Aristotle's Categories (Bruno Tremblay) -- Interconnected Literal Commentaries on the Categories in the Middle Ages (Robert Andrews) -- Thomas Aquinas on Establishing the Identity of Aristotle's Categories (Paul Symington) -- Reading Aristotle's Categories as an Introduction to Logic: Later Medieval Discussions about Its Place in the Aristotelian Corpus (Giorgio Pini) -- Simon of Faversham on Aristotle's Categories and The Scientia Praedicamentorum (Martin Pickavé) -- Duns Scotus's Account of a Propter Quid Science of the Categories (Lloyd A. Newton) -- Fine-tuning Pini's Reading of Scotus's Categories Commentary (Todd Bates) -- How Is Scotus's Logic Related to His Metaphysics? A Reply to Todd Bates (Giorgio Pini) -- John Buridan: On Aristotle's Categories (Alexander W. Hall) -- A Realist Interpretation of the Categories in the Fourteenth Century: The Litteralis sententia super Praedicamenta Aristotelis of Robert Alyngton (Alessandro D. Conti) -- Thomas Maulevelt's Denial of Substance -- Thomas Maulevelt: Quaestiones super Praedicamenta: Quaestio 16 (Robert Andrews) -- Categories and Universals in the Later Middle Ages (Alessandro D. Conti) -- Bibliography -- List of Contributors -- Index.