"DEFTEST now contains 24000 entry terms with 155000 cross references. Approximately 1000 new terms have been added. The meaning or usage of terms and their hierarchies is represented by cross references. The hierarchical display assists in the choice of the most appropriate level of specificity for indexing and retrieval. (...) DEFTEST is not Intended as a comprehensive coverage of the fields of science and technology, but of Defence related topics in those fields, as represented inthe database."