When the libraries started to use computers and the first data bases: information sources were divided into: printed sources and electronic sources. Traditional card catalogues and printed bibliographies as the first mentioned sources were replaced with its electronic equivalents. The electronic sources give information not only about publications available in your library but make it possible to obtain bibliography of all publications, even these ones not published in Europe and to obtain specific factographic materials, photos, articles etc.

On next pages you will find more detailed information about the three essential kinds of electronic sources:

• Library catalogues - (the Main Library, the Institute of Physics Library)
• CD-ROM bases
• Internet

Page elaborated by Dominika Czyżak.