The Information Science thesaurus has been created as an inductive and normative tool for indexing and recovering processes in the scientific contents. The thesaurus has been structured in six fields: 1. Library and Information Science: history, theory, systems. 2. Information. Documents. Information sources 3. Research and methodology 4. Information representation and retrieval 5. Information systems 6. Information technologies The thesaurus has 4 indexes: hierarchic, alphabetical, KWOC and an English-Spanish index.