The National Documentation Centre (EKT) of Greece, is a service unit of the National Hellenic Research Foundation (NHRF), and is the national institution for documentation, information and support, on science, research and technology issues. EKT's S&T Library services aim at the country's entire scientific and business community, universities, research centres, enterprises, public and private sector bodies. It provides Science & Technology (S&T) information services, operates the Science and Technology Digital Library, develops and promotes Greek digital content, such as the National Archive of PhD Theses, supports the automation and networking of libraries and develops the Union Catalogue of Serials in S & T Greek libraries. With highly skilled, experienced staff and specialised technological infrastructure, EKT covers the scientific information needs all over the country. Furthermore, it monitors international trends, develops collaborations and networks and participates in national and European projects. The article aims to provide an overview of the services offered, their evolution through the years and outline how EKT is being established as an infrastructure of ‘national use’, serving the Greek libraries, the Greek scientific community and beyond