In general, it can be said that consulting the catalogue allows the Library to be used with greater efficiency and autonomy.
Anyone who gives up on a loan request or consultation because they think the book doesn’t exist just because it’s not on the shelf, may be harmed.
By consulting the Library catalogue, you can check whether or not the document you want exists in the available collections and, from there, obtain information about the situation in which the book is (in local/restricted consultation, loaned to the outside, permanent in a given Department, etc).
It is possible to locate different types of documents: books, journals, theses and dissertations, reports and other documents of different types.