 Physics and Astronomy Classification Scheme

The Physics and Astronomy Classification Scheme (PACS) is a system used to categorize publications in the fields of physics and astronomy. Developed by the American Institute of Physics (AIP), PACS provides a structured framework to organize and identify research topics and areas within these disciplines. The classification scheme uses a series of alphanumeric codes that correspond to specific areas of research, making it easier for researchers, librarians, and publishers to locate and index relevant articles and papers.