The Scientific Electronic Library Online (SciELO) is a model for cooperative electronic publishing of scientific journals on the Internet. Conceived for enhancing scientific production and communication of Latin American and Caribbean countries SciELO provides an efficient way to assure universal accessibility to their scientific literature. It enables many services, from the online publication of complete editions of scientific journals to the organization of searchable bibliographical and full-text databases, from the preservation of electronic archives to the production of statistical indicators of the Ibero American scientific literature usage and impact. Full texts are enriched with dynamic hypertext links with national and international databases, and direct links to electronic journals are provided as well. The SciELO is available in three languages: English, Spanish and Portuguese and a special Social Sciences English Edition is available for the international public. SciELO covers many disciplines and many social sciences journals are present. All contents are, consistently with its mission, provided for free and can be downloaded usually in pdf format. Journals and contents can be browsed by country, topic or alphabetically, and a simple search feature is also available. Navigation and orientation are therefore quite comfortable.