A few years ago, the network of the McGill University's libraries in Montreal has been computerized. The whole community of the campus and the affiliated institutions have now a direct access to two catalogues, the libraries' catalogue, and the on-line CD-Rom database. These catalogues are the answer to the increasing need for the quality of information and its availibility to its users. The article gives an historical approach of the network, its development and its implementation. This experiment is the best example of what a North American University within the world of information at the end of the century can do.