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The key challenges of the Russian Academy of Sciences Library in its transfer «from the printed to digital»

The results of the transfer from the card reference and bibliographic instrument to e-catalog are summarized. Options for using library e-catalogs for advanced user bibliographic services are discussed. The library’s book collection is partially conversed into full-text e-library; many books are digitized for the web-portal «Scientific heritage of Russia». The variations of targeted thematic full-text collections with bibliographic browsing and search formats are analyzed; options for graphic formats for full-text publications in e-libraries to provide fast access to the books directly from the catalog are examined.