Résumé: Open source software have been able to impose themselves in all areas in a short period of time thanks to their particular characteristics. The field of libraries has not escaped from the modern technical orientations. A great number of world libraries have invested in these software to activate and develop their services. The Algerian university libraries have chosen the way towards the use of these software in shade of the shortage of their budget and the possibility of benefitting from these software free of charge on the Internet with the availability of their source code and the possibility for amending them in line with the needs of these libraries. One of these important experiments is certainly that of the University Benyoucef Benkhadda-Algiers 1-Central Library in using Dspace system. Throughout our study, we will highlight this experiment via the identification of, on the one hand, the degree of its benefit from the means provided by this software, and, on the other hand, the power of the library in adapting it, so that new services can be developed for responding to some of the users' needs

Résumé: The research aims to shed light on one of the experiences of the Algerian university libraries in the use of open source software. This is the ex perience of Ben Youssef Ben Khdeh University through knowledge of the areas of utilization in improving the library's information services and the extent to which they are used to provide and develop these services. The results of the study showed the ineffective use of this software due to lack of human resources, lack of awareness among university decision -makers and lack of awareness of the potential of open source software to provide effective quality services. The research offers a number of suggestion s, including: raising awareness among Algerian decision makers of the potential of OSS and the availability of proven and supported software applications, and that the development of this software through investment in the human resources concerned with programming is an added value to the information institutions and the society as a whole. The integration of open source software into educational programs in the institutes and departments of librarianship to ensure graduates who are familiar with the ways to exploit and benefit from this software