Physics and Astronomy Classification Scheme® (PACS®)

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.