Classification
617 - Surgery & related medical specialties
386
610 - Medicine & health
102
616 - Diseases
37
061 - Organizations in North America
30
620 - Engineering & allied operations
20
600 - Technology
13
700 - The arts; fine & decorative arts
12
006 - Special computer methods
10
571 - Physiology & related subjects
10
580 - Plants (Botany)
9
330 - Economics
8
333 - Economics of land & energy
8
570 - Life sciences; biology
6
612 - Human physiology
6
615 - Pharmacology & therapeutics
6
000 - Computer science, information & general works
5
140 - Specific philosophical schools
5
370 - Education
5
613 - Personal health & safety
5
614 - Incidence & prevention of disease
5
301 - Sociology & anthropology
3
380 - Commerce, communications & transportation
3
530 - Physics
3
900 - History & geography
3
338 - Production
2
344 - Labor, social, education & cultural law
2
363 - Other social problems & services
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
572 - Biochemistry
2
579 - Microorganisms, fungi & algae
2
590 - Animals (Zoology)
2
611 - Human anatomy, cytology & histology
2
658 - General management
2
791 - Public performances
2
003 - Systems
1
057 - Serials in Slavic languages
1
100 - Philosophy & psychology
1
150 - Psychology
1
170 - Ethics
1
300 - Social sciences
1
320 - Political science
1
381 - Commerce
1
500 - Natural sciences & mathematics
1
519 - Probabilities & applied mathematics
1
547 - Organic chemistry
1
576 - Genetics & evolution
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
621 - Applied physics
1
780 - Music
1