"The International Energy Agency: Subject Thesaurus contains the standard vocabulary of indexing terms (descriptors) developed and structured to build and maintain energy information databases. Involved in this cooperative task are (1) the technical staff of the U.S. DOE Office of Scientific and Technical Information (OSTI) in cooperation with the member countries of the International Energy Agency`s Energy Technology Data Exchange (ETDE) and (2) the International Atomic Energy Agency`s International Nuclear Information System (INIS) staff representing the more than 100 countries and organizations that record and index information for the international nuclear information community. ETDE member countries are also members of INIS. Nuclear information prepared for INIS by ETDE member countries is included in the ETDE Energy Database, which contains the online equivalent of the printed INIS Atomindex. Indexing terminology is therefore cooperatively standardized for use in both information systems. This structured vocabulary reflects the scope of international energy research, development, and technological programs. The terminology of this thesaurus aids in subject searching on commercial systems, such as 'Energy Science & Technology' by DIALOG Information Services, 'Energy' by STN International and the 'ETDE Energy Database' by SilverPlatter. It is also the thesaurus for the Integrated Technical Information System (ITIS) online databases of the US Department of Energy. Descriptors are added to the thesaurus as needed (i.e., when a document contains a concept for which there is no adequate term or terms in the thesaurus). More than 27,000 appear in this document, which replaces the U.S. DOE publication Energy Data Base: Subject Thesaurus."