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Call-Number Scheme
 
The Hirsh Library uses the National Library of Medicine Classification for its call numbers in clinical sciences, dentistry and medicine. The NLM Classification is a system of mixed notation, where letters denote disciplines, specialties, systems or other broad subjects, and numbers specify more particular subjects or types of works. For instance, anatomical atlases would be shelved at QS 17, while general psychiatric textbooks would be shelved at WM 100. An interactive index of the complete system is available at NLM: Outline of the NLM Classification.

QS Human Anatomy   WG Cardiovascular System  
General Works
Q's = 4
W's = 100
QS 504 Histology   WH Hemic & Lymphatic Systems
Atlases = 17
QT Physiology   WI Digestive System
Diagnosis = 141
QU Biochemistry   WI 700 Liver
Dictionaries = 13
QV Pharmacology   WJ Urogenital System
Handbooks = 39
QV 600 Toxicology   WJ 600 Kidney
Lab Manuals = 25
QW Microbiology   WK Endocrine System
Laws = 32
QW 501 Immunology   WL Nervous System
Statistics & Tables = 16
QY Pathology, Clinical   WM Psychiatry  
QZ Pathology   WN Radiology  
QZ 50 Genetics   WN 180 Diagnostic Imaging  
W Health Professions   WO Surgery  
WA Public Health   WO 200 Anesthesia  
WA 108 Preventive Medicine   WP Gynecology  
WB Practice of Medicine   WQ Obstetrics  
WB 141 Diagnosis, General   WR Dermatology  
WB 300 Therapeutics   WS Pediatrics  
WC Communicable Diseases   WT Geriatrics  
WD 100 Nutrition Disorders   WT 500 Chronic Disease  
WD 200 Metabolic Diseases   WU Dentistry  
WD 300 Immunologic & Collagen Diseases   WV Otolaryngology  
WE Musculoskeletal System   WW Ophthalmology  
WF Respiratory System   WX Hospitals & Health Facilities