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Schedules—Relationship to LCC

These LCC schedules are not used by NLM

• QM—Human Anatomy (NLM uses QS)
• QR—Microbiology (NLM uses QW)
• R—Medicine (NLM uses QT-QZ; W-WZ)

These LCC schedules supplement the NLM Classification for non-medical topics

• B—Philosophy. Psychology. Religion
• G—Geography. Anthropology. Recreation
• H—Social Sciences
• J—Political Science
• L—Education
• Q—Science
• SF—Animal Culture
• Z—Bibliography. Library Science

LCC schedules used by NLM with restrictions

• D-E History (Used mainly for wars)
• K—Law (Rarely used)
• QD—Chemistry (Use QU or QV for biochemistry or pharmacology)
• QH—Natural History. Biology (General) (Use QU, etc. for biomedical aspects)
• QK—Botany (Use QV 766-770 for medicinal plants; or WB 925 for Herbal Medicine
• QP—(Restricted to wild animals)
• T—Technology (Use QT for biomedical engineering)
• U—Military Science (Use only for administrative aspects)
• V—Naval Science (Use only for administrative aspects)

Special Instructions for using LCC Class Number

• When using an LC class number subdivided by geographic or A-Z topic, the appropriate cutter should be included in the NLM class number. Geographic cutters should be taken from the Library of Congress Classification and Shelflisting Manual: Shelflisting, Section G300 Regions and Countries Table If a double LC author cutter is present, NLM does not use the second cutter in the classification number
• Unlike LCC, NLM class numbers are formatted with a space between the alpha and numerical call number