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If you want an overview of this site, you can visit the following links, that contains a detailed index of all the pages.
Index of the most important pages in two parts:
Abridged Index: First Part (Alphabetical Index of the Philosophers, Theory, History)
Abridged Index: Second Part (Ontological Topics, Past and Living Ontologists, Other Philosophical Topics, History of Logic, Essays and Bibliographies)
Definitions of Ontology by Leading Philosophers
The Vocabulary of Ontology
Language and Ontology
Semiotics and Ontology
Modern Theories of Predication
The Problem of Universals
Henology or Ontology: Metaphysics of the One vs. Metaphysics of Being
Semantics and Predication Before Aristotle: Parmenides and Plato
Metaphysics or Ontology? The Debate about the Subject Matter of First Philosophy
Neoplatonic Metaphysics in the Early Middle Ages
The Arabic Rediscovery of Aristotle's Metaphysics
The 'Second Beginning' of Metaphysics in the Middle Ages
The Rise and Fall of Ontology in the Modern Era from Suárez to Kant
The Rediscovery of Ontology in Contemporary Thought
History of the Theories of Truth in Western Philosophy
History of the Theories of Categories
The Problem of Universals from the Antiquity to Middle Ages
History of the Ontological Argument for the Existence of God
Other Pages on the History of Philosophy
Study Guides to Western Philosophy
Study Guides to Comparative Philosophy
Annotated Bibliographies of Historians of Philosophy
General Introduction: Logic and Ontology
The Logical Works of Aristotle
Ancient Logic after Aristotle
Developments of Medieval Logic
Developments of Modern Logic
A Selection of Prominent Logicians
History of Ancient Philosophy from the Presocratics to the Hellenistic Period
History of Medieval Philosophy from the Boethius to ca. 1400