A description of the system used by Space Documentation Service (SDS) to disseminate combined and accumulated knowledge, as widely as possible, throughout Europe is given. The RECON network, with the full support of NASA, has gradually been extended so that centers in Member States, may, by installing their own terminals, have direct access to the data base. The data base itself has been broadened to include not only the NASA file, but also that of Metals Abstracts, Engineering Index and the U. S. Government Research and Development Reports. Other files are under consideration. The feasibility of developing new features which would be of value in the searching of the data-base is being studied and a continuous monitoring of the system, services and procedures is taking place to ensure efficiency and effectiveness. (Author)