The Open Encyclopedia System (OES) is a specialized web application for academic institutions and research projects to create, publish, and manage structured online reference works like encyclopedias, lexicons, and handbooks. It is designed for the humanities and social sciences, supporting the open-access dissemination of scholarly knowledge.

Lemma-Based Publishing: The system is structured around entries (lemmas), providing a standardized framework for organizing and interlinking articles, which is essential for authoritative reference works.

Dual-Environment Architecture: It operates with separate editorial and public-facing interfaces. This allows editorial teams to collaborate on content preparation and review in a controlled workspace before publishing to the live site.

Open Source and Extensible: Built as an extension for a widely-used open-source content management system, OES is available as a plugin with accompanying themes. Its open-source nature allows for customization and reuse by other projects.

Project Support and Consultation: The developing institution offers direct support for project conception and implementation, including consultation on usage and partnership in grant proposals, facilitating a complete publishing workflow.

Proven Use Cases: The system is actively used for established online publications, demonstrating its capability to handle real-world academic projects requiring complex content structures and sustainable maintenance.