NLM Classification

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

美国国家医学图书馆精心编纂的医学及相关科学领域国际通用图书馆资料编排体系。该分类体系每年更新两次，冬季版于一月出版，夏季版于八月出版。自1999年第5次修订版起，印刷版已停止出版。自2006年版起，NLM分类体系亦可通过https://www.nlm.nih.gov/class/terms_cond.html提供PDF（便携文档格式）版本。