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Cataloging and Metadata Management: Fundamentals of the NLM® Classification

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19th Century Schedule

  • Not part of the main NLM Classification
  • Accessible via a link from the NLM Classification homepage

Screen capture of the link to the 19th Century Schedule from the NLM Classification homepage.

  • Simplified subject classification developed in 1956 that is derived from the letters that represent the preclinical and clinical subjects
  • Mostly limited to combinations of letters
    • QS, QSA, QSB, QT, etc.
    • Exceptions:
      • W1-6, W 26, W 600, WX 2, and form number 22 appearing throughout the schedule
  • In addition, the entire WZ schedule is used for 19th century works
  • When the subject falls outside of the scope of the schedules of the NLM Classification, only the letters of the LC schedule representing the subject are used
    • Examples:
      • BF for Psychology
      • SF for Veterinary Medicine
  • Also used for facsimiles and reprints of works published between 1801-1913
  • Classify here translations of works originally published from 1801-1913 only if the translation itself is published from 1801-1913


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