This paper considers the variety of pressures on Polish libraries
for computer application in the field of data processing for
old book collections. Four points of view are under consideration:
1) strategy for the choice of collections or the old print units foedata
processing during the first stage of the computer application;
2) methods of description, especially the levels of details for different
purposes; 3) unification of bibliographical sources for idetification
of the old prints; 4) cooperation with abroad libraries.
As a suggestion for the last one author proposes a participation in
the ESTC - British Library in London.