Classification
616 - Diseases
277
610 - Medicine & health
208
700 - The arts; fine & decorative arts
31
617 - Surgery & related medical specialties
24
140 - Specific philosophical schools
22
330 - Economics
22
000 - Computer science, information & general works
17
614 - Incidence & prevention of disease
17
600 - Technology
16
579 - Microorganisms, fungi & algae
14
615 - Pharmacology & therapeutics
13
380 - Commerce, communications & transportation
12
576 - Genetics & evolution
12
300 - Social sciences
10
333 - Economics of land & energy
10
363 - Other social problems & services
10
613 - Personal health & safety
10
304 - Factors affecting social behavior
8
370 - Education
8
551 - Geology, hydrology & meteorology
8
570 - Life sciences; biology
8
571 - Physiology & related subjects
8
618 - Gynecology, obstetrics, pediatrics & geriatrics
8
540 - Chemistry & allied sciences
6
301 - Sociology & anthropology
5
320 - Political science
5
500 - Natural sciences & mathematics
5
580 - Plants (Botany)
5
612 - Human physiology
5
620 - Engineering & allied operations
5
658 - General management
5
900 - History & geography
5
100 - Philosophy & psychology
4
170 - Ethics
4
519 - Probabilities & applied mathematics
4
590 - Animals (Zoology)
4
572 - Biochemistry
2
641 - Food & drink
2
664 - Food technology
2
003 - Systems
1
005 - Computer programming, programs & data
1
306 - Culture & institutions
1
331 - Labor economics
1
353 - Specific fields of public administration
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
372 - Elementary education
1
410 - Linguistics
1
414 - Phonology & phonetics
1
more ...