Features introductory material and bibliography, standard notation, events, projects, tools and researchers.

Provides background material and tutorials on ontology and related topics in logic, conceptual graphs, and natural language semantics.

Charitable organization concerned with fostering research and communication on knowledge representation and reasoning. Features conferences, educational materials and mailing lists.

Aims to create a framework for conceptual knowledge processing in terms of social structures and a common code base. Features software description and contact details.

A set of tools using Conceptual Graphs formalism for building and documentation of knowledge bases, indexing or connecting elements of WWW-accessible documents.