Centralised agencies in countries such as the former USSR, France, Japan and China have been attempting comprehensive I & A services to cover all types of literature in the entire field of science and technology. The major aim is to overcome language barrier in the matter of providing access to world information to their scientists, of which a significant part would be in foreign languages.. Even though these services are produced by a centralised agency, they are brought out in variety of series devoted to the main subject areas on consideration of ease in physical production and convenience of use.
1) Referativnyi Zhurnal, 1953- Periodicity varies. Published in more than 40 separate series, each devoted to particular field in science and technology. Published by the All Union Institute for Scientific and Technical Information (VINITI), Moscow.
2) Pascal Explore, 1985 (Supercedes Bulletin Signaletique, 1961-1984) 10 issues/year. Published in several series according to major subjects. Published by the Centre National de la Recherche Scientifique, Centre de Documentation et Technique, Paris.