There are research classification systems for mathematics (MSC) and physics (PACS and subsequently PhySH) which help the researchers to navigate through codes composed by letters/numbers made by associations that specialise in those pieces of human knowledge. Are there any classification systems of research in chemistry?

  • 3
    $\begingroup$ I guess I always thought there would be… Although, frankly, PACS is not very useful… $\endgroup$
    – Jon Custer
    Jul 10 at 0:50
  • $\begingroup$ I'm not sure if it counts as a classification system, but SciFinder can be used to filter research papers based on many criteria. Each chemical has a CAS number as well. $\endgroup$
    – Akash
    Jul 10 at 15:46


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