Foreign background		Through the network we can search the catalogues of several Hungarian and foreign libraries (Hungarian Academy of Sciences, Technical University of Budapest, Attila József University of Sciences in Szeged, American Library of Congress, etc.), furthermore, we provide a monthly choice from the journals of the Central Library of the Technical University of Budapest (American Journal of Physics, Circuits System and Signal Processing, Proceedings of the London Mathematical Society, etc.). To supplement data purpose, we can access the Catalogues of foreign Publishers (Kluwer, Prentice Hall, Oxford University Press, Academic Press, etc.).