The document summarizes the library services provided by the University Library System (SBA) of Politecnico di Milano. It describes the various web services, electronic resources, libraries, and services available, including searching the online catalogue, accessing e-journals and databases, interlibrary loans, reference services, and more. Users include internal university affiliates as well as external users who can purchase access badges. The SBA aims to improve services through new initiatives and innovations listed on their website. Key services covered are consultation, loans, renewals, penalties for overdue items, and intra-university loans between campuses.