This unit takes care of cataloguing, classification, lettering, maintenance of public catalogue etc. To preparing a book for readers this unit use AACR-2 cataloguing code, for classification DDC 22 nd and Library of Congress are used only, for subject heading. To aware the user public catalogue are arranged Author, Title and Subject. Koha database (Open access) have been installed and more than five thousand data (Text Books) already has been entered.