Any National Library has traditionally the role of preserving documents that are part of the national cultural heritage and to provide different categories of users with advanced services to access in the most effective way the “physical objects”, often rare and perishable, that are stored in the library. More and more in the future, services offered to the users will comprise discovery and retrieve of "information resources" available in digital format both at local and at networked level. This will reduce the necessity of handling original documents (thus improving their preservation) and at the same time greatly expanding the number and the variety of reference sources. I’d like to give you some information about some recent experiences of the National Library of Rome, driven by a strong and continuous attention to our users’ requirements.