The problem addressed by this project is the urgent need of consolidated administrative nomenclatures and legal terminologies as tools to enhance interoperability and cross border collaboration. Without high quality and standards-based terminologies, it is impossible to reach precision, efficiency, and transparency within and across any services, processes and systems in the areas of legal and administrative work. For this project the domain of social security legislation and administration has been selected as a concrete area for which currently there is a high need for such resources but there are no transnational initiatives and no current solutions available to satisfy these needs and to provide a solution. In current manual working environments, high-quality legal terminology work is almost impossible, highly inefficient, and incredibly expensive and thus blocks the full potential of using the resources as a tool for legal support for interoperability.The proposed service that the project establishes is a web-based terminology service platform focusing on consolidated administrative nomenclatures and terminologies as tools to enhance interoperability and cross border collaboration among national institutions cooperating with each other as well as with EU authorities. The project also provides improved accessibility to high quality terminology resources in legal and administrative domains and in different languages and to enable organizations to improve, enhance, and use more efficiently their own terminology repositories at local, regional, national, and trans-national levels.With the user group consortium of the project, we establish and maintain, on the basis of this web-based service infrastructure, a network of European government units, companies, terminology organizations, etc. with the purpose of further developing, harmonizing, and disseminating administrative and legal terminologies and supporting their consistent use in real life situations.