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NLM Classification 2016: Worldwide source of medical library classification


Musculoskeletal System

  • Classify general works on the musculoskeletal system and its diseases in children in WS 270.
  • Classify works on musculoskeletal disease nursing and nursing of patients with specific musculoskeletal diseases in WY 157.6.


  WE 1-141 Reference Works. General Works
  WE 168-190 Orthopedic Procedures
  WE 200-259 Bones
  WE 300-400 Joint and Connective Tissues
  WE 500-600 Muscles and Tendons
  WE 700-708 Head and Neck
  WE 710-760 Torso
  WE 800-886 Extremities
      WE 800 General Extremities
      WE 805-835 Upper Extremity
      WE 850-886 Lower Extremity
  WE 890 Podiatry

Reference Works. General Works

WE 1
Organizations. Societies (General or not elsewhere classified) (Cutter from name of organization or society) (Table G)
(Used for both monographs and serials)
Includes membership lists issued serially or separately. Classify directories in WE 22. Classify annual reports, journals, etc. in W1. For academies and institutes, see WE 23-24.
Collected works (General)
WE 5
By several authors
WE 7
By individual authors
WE 9
Addresses. Essays. Lectures (General)
WE 11
History (Table G)
WE 11.1
General coverage (Not Table G)
WE 13
Dictionaries. Encyclopedias
(Used for both monographs and serials)
WE 15
Classification. Terminology
(Used for both monographs and serials)
WE 16
Tables. Statistics. Surveys (Table G)
(Used for both monographs and serials)
WE 16.1
General coverage (Not Table G)
(Used for both monographs and serials)
WE 17
Atlases. Pictorial works
Classify atlases limited to a particular part of the system here also.
WE 18
Classify here works about education.
WE 18.2
Educational materials
(Used for both monographs and serials)
Classify here educational materials, e.g., outlines, questions and answers, programmed instruction, computer-assisted instruction, etc., regardless of format. Classify textbooks, regardless of format, by subject.
WE 19
Schools, departments and faculties of orthopedics (Table G)
(Used for both monographs and serials)
Include here works on the history of schools. Classify courses of study, college catalogs, etc., in W 19.5.
WE 19.1
General coverage (Not Table G)
(Used for both monographs and serials)
WE 20
Research (General)
Classify here works about research in general. Classify works about research on a particular subject by subject.
WE 21
Orthopedics, osteology or rheumatology as a profession. Ethics. Peer review
WE 22
Directories (Table G)
(Used for both monographs and serials)
WE 22.1
General coverage (Not Table G)
(Used for both monographs and serials)
Laboratories, academies, institutes, etc.
WE 23
WE 24
Individual (Cutter from name of institution)
WE 25
Laboratory manuals. Technique
WE 26
Equipment and supplies
Classify catalogs in W 26. Classify works on bone plates and screws in WE 185.
WE 26.5
Informatics. Automatic data processing. Computers (General)
Classify works on use for special subjects by subject.
Hospitals, clinics, dispensaries, etc.
WE 27
Collective (Table G)
WE 27.1
General coverage (Not Table G)
WE 28
Individual (Cutter from name of hospital) (Table G)
Museums, exhibitions, etc.
WE 28.5
WE 28.6
Individual (Cutter from name of museum, etc.) (Table G)
WE 32
Laws (Table G)
(Used for both monographs and serials)
WE 32.1
General coverage (Not Table G)
(Used for both monographs and serials)
WE 33
Discussion of law (Table G)
(Used for both monographs and serials)
WE 33.1
General coverage (Not Table G)
(Used for both monographs and serials)
WE 39
Handbooks. Resource guides
(Used for both monographs and serials)
WE 100
General works
Classify works on both the specialty and diseases here. Classify works on the specialty only in WE 21. Classify works on diseases only in WE 140.
WE 101
Anatomy. Histology. Embryology (General)
WE 102
Physiology. Biochemistry
Classify works on muscle physiology only in WE 504.
WE 103
Movement. Locomotion
WE 104
Proprioception. Psychomotor performance
WE 140
Diseases (General)
WE 141
Examination. Diagnosis. Diagnostic methods. Monitoring
Classify material on a specific site with the site.

Orthopedic Procedures

WE 168
Orthopedic procedures (General or not elsewhere classified)
Classify works on orthopedics as a profession in WE 21.
WE 170
Classify here all works on amputation regardless of site.
WE 172
Artificial limbs
Classify catalogs in W 26.
WE 175
Dislocations. Sprains
WE 180
Fractures (General or not elsewhere classified)
For osteoporotic fractures see WE 250.
WE 182
Open fractures
WE 185
Fracture fixation
WE 190
Bone transplantation


WE 200
Bone and bones (General)
Include works on structure and function of bones in general. Classify works on specific bones with part or system involved.
WE 202
Bone physiology
WE 225
Bone diseases (General or not elsewhere classified)
Classify works on eosinophilic granuloma in WH 650.
WE 250
Congenital abnormalities. Disorders of metabolism, growth, or development
Classify works on abnormalities of specific bones or regions with the bone or region. Classify works on systemic metabolic disorders involving the bones in WD 200-205.5.
WE 251
Osteomyelitis and other infectious bone diseases
WE 253
Osteoarticular tuberculosis
WE 258
Classify works on neoplasms of specific bones by site.
WE 259
Osteochondritis. Osteochondrosis

Joint and Connective Tissues

WE 300
Joints. Ligaments. Synovial membranes and fluid. Cartilage
Classify works on specific sites by site.
WE 304
Joint diseases
WE 312
Classify arthroplasty of a specific joint with the joint.
WE 344
WE 346
Rheumatoid arthritis. Ankylosis
Cf. WU 140 Temporomandibular joint ankylosis; WE 725 Ankylosing spondylitis.
WE 348
Degenerative joint disease. Osteoarthritis
WE 350
WE 400
Synovial bursa. Bursitis

Muscles and Tendons

WE 500
Muscles (General). Fascia
Include works on structure and function. Classify works on diseases in general in WE 550. Classify works on specific muscles with part or system involved.
WE 504
Muscle physiology
WE 510
Trigger points
WE 544
Rheumatic diseases
WE 545
Classify works on muscle contraction in WE 500; on muscle cramp and myoclonus in WE 550.
WE 550
Muscular diseases. Neuromuscular diseases (General or not elsewhere classified)
Classify works on neuromuscular diseases of the eye in WW 400-475.
WE 552
Amyotrophic lateral sclerosis
WE 555
Myasthenia gravis
WE 559
Muscular dystrophies
WE 560
WE 600

Head and Neck

WE 700
Head and neck
WE 705
Head. Face
Cf. WU 101-102 works for the dentist. Classify works on the jaw in WU; on the temporal bone written for the otolaryngologist in WV 201.
WE 706
Head and neck injuries
Classify works on bone and soft tissue injuries of the face and skull here; classify works which include brain injury at WL 354; classify works on neck injuries alone at WE 708.
WE 707
Head and neck neoplasms
Classify here works on the head and neck or the skull.
WE 708


WE 710
Torso (General or not elsewhere classified)
WE 715
Classify works on anatomy and physiology here as well as those on bone disorders and malformations. Classify works on organs or systems within the thoracic cavity, as well as thoracic surgery, in WF.
WE 720
WE 725
Spine. Vertebrae
Cf. Spinal cord WL 400-405; classify works on lumbar and sacral vertebrae in WE 750.
WE 727
Spinal diseases
Cf. Spinal cord diseases WL 402-403. Classify works on spinal tuberculosis in WE 253.
WE 730
Congenital abnormalities
WE 735
Spinal curvatures
WE 737
Spinal injuries
WE 740
Intervertebral discs
WE 750
Lumbosacral region. Sacrococcygeal region
WE 755
Low back pain. Sciatica
WE 760
Classify works on gynecological aspects of the pelvis in WP 155.


General Extremities

WE 800

Upper Extremity

WE 805
Upper extremity
WE 810
Shoulder. Upper arm
WE 812
WE 820
Elbow. Forearm
WE 830
Wrist. Hand
WE 832
Hand infections. Hand injuries
WE 833
Hand deformities
WE 835

Lower Extremity

WE 850
Lower extremity
Classify works on varicose veins in WG 620.
WE 855
Hip. Upper leg
WE 860
Hip joint
WE 862
Hip replacement
WE 865
Femur. Thigh
WE 870
Knee. Lower leg
WE 872
Knee and knee joint injuries
WE 874
Knee replacement
WE 880
Ankle. Foot. Toes
WE 882
Ankle injuries. Foot injuries. Toe injuries
WE 883
Foot deformities
WE 886


WE 890