A product of the National Library of Medicine for the arrangement of library materials in the field of medicine and related sciences used internationally. The NLM Classification is updated twice a year with the winter edition published in January and the summer edition published in August. Publication of printed editions ceased with the 5th revised edition, 1999. Beginning with the 2006 edition, the NLM Classification is also available in PDF (Portable Document Format) at https://www.nlm.nih.gov/class/terms_cond.html
Class Numbers Added and Canceled (Current Edition)
Canceled Class Numbers (Cumulative List)
The National Library of Medicine cancels classification numbers from its schedules for a variety of reasons - most often classification numbers are realigned to better reflect their domain and improve collocation of materials on related concepts.
Table G is a cutter system of notations that provides geographical or jurisdictional arrangement of materials under specific class numbers in the NLM Classification. The use of Table G permits a shelving order which is controlled geographically and alphabetically.
Classify here works 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.