PACS (Physical Review)

PACS, or the Physics and Astronomy Classification Scheme, is a system used by Physical Review journals to categorize research articles by their main topics. It helps organize and identify content related to specific areas of physics, making it easier for researchers to find relevant studies. Each article is assigned PACS codes that represent its subject matter, similar to a library classification system. This standardized approach improves the efficiency of literature searches and ensures clear communication about the article’s focus within the scientific community.