The first catalogue, by subject and by author, was printed in 1908. It was updated yearly until 1915, when it was replaced by the card catalogue in alphabetical order by author.
The constant growth of the economic and financial section's resources led to the introduction of automation in 1965. This made it possible to catalogue (by author and title) the contributions to periodicals and books with multiple authors and the introduction of useful search keywords. The automated procedure, however, was only applied to new accessions; for pre-existing resources, the old catalogue with paper index cards is still in use.
By the end of the 1980s, a more up-to-date computerised system brought the bibliographic management of the Law Library up to level with the Paolo Baffi Library; this also enhanced the effectiveness of the reference service offered by both libraries to internal staff and external users.
Since 2003, thanks to the adoption of Aleph500 software, the bibliographical descriptions of works owned by the Paolo Baffi Library and by the Law Library have been combined in a single catalogue. The new system also allowed the adoption of international cataloguing standards (ISBD and UNIMARC).
The Paolo Baffi Library has recently been engaged in closer co-operation with libraries at the national and international level, through participation in the Catalogo Italiano dei Periodici (ACNP) (Italian Catalogue of Periodicals), the Catalogo degli articoli dei periodici italiani di economia, diritto, scienze sociali e storia (ESSPER) (Catalogue of articles in Italian periodicals on economics, law, social sciences and history), in the Network Inter Library Document Exchange (NILDE), in the Associazione degli Utenti Italiani Aleph (ITALE) (Association of Italian Users of Aleph), and in the Central Bank and International Financial Institutions Librarians' Discussion List.