AIP Thesaurus Replaces PACS
The AIP Thesaurus has replaced PACS (Physics and Astronomy Classification Scheme) as an aid in indexing and retrieving scientific information. Over the years, PACS was updated and enhanced on a biannual basis and continued to serve the scientific community well. However, the continuing evolution of indexing, search, and technology has brought into focus the inherent limitations of PACS and as a result, AIP decided that PACS® 2010 would be the final version. AIP gratefully acknowledges all those who kindly offered assistance and cooperation in the development and maintenance of PACS over the years; their efforts have been greatly appreciated.