text: The term "logic" he reserved to mean dialectics.Most of Aristotle's work is probably not in its original form, because it was most likely edited by students and later lecturers.The logical works of Aristotle were compiled into a set of six books called the Organon around 40 BC by Andronicus of Rhodes or others among his followers.The books are: Categories On Interpretation Prior Analytics Posterior Analytics Topics On Sophistical Refutations The order of the books (or the teachings from which they are composed) is not certain, but this list was derived from analysis of Aristotle's writings.It goes from the basics, the analysis of simple terms in the Categories, the analysis of propositions and their elementary relations in On Interpretation, to the study of more complex forms, namely, syllogisms (in the Analytics) and dialectics (in the Topics and Sophistical Refutations).The first three treatises form the core of the logical theory stricto sensu: the grammar of the language of logic and the correct rules of reasoning.The Rhetoric is not conventionally included, but it states that it relies on the Topics.Metaphysics The word "metaphysics" appears to have been coined by the first century AD editor who assembled various small selections of Aristotle's works to the treatise we know by the name Metaphysics.Aristotle called it "first philosophy", and distinguished it from mathematics and natural science (physics) as the contemplative (theoretikē) philosophy which is "theological" and studies the divine.He wrote in his Metaphysics (1026a16): Substance Aristotle examines the concepts of substance (ousia) and essence (to ti ên einai, "the what it was to be") in his Metaphysics (Book VII), and he concludes that a particular substance is a combination of both matter and form, a philosophical theory called hylomorphism.In Book VIII, he distinguishes the matter of the substance as the substratum, or the stuff of which it is composed.