Classification
610 - Medicine & health
1,366
363 - Other social problems & services
119
330 - Economics
102
370 - Education
96
700 - The arts; fine & decorative arts
72
380 - Commerce, communications & transportation
59
100 - Philosophy & psychology
40
576 - Genetics & evolution
26
340 - Law
25
600 - Technology
25
000 - Computer science, information & general works
23
140 - Specific philosophical schools
22
333 - Economics of land & energy
19
612 - Human physiology
18
170 - Ethics
15
362 - Social welfare problems & services
15
900 - History & geography
14
580 - Plants (Botany)
12
361 - Social problems & social welfare in general
10
500 - Natural sciences & mathematics
10
800 - Literature & rhetoric
9
615 - Pharmacology & therapeutics
8
616 - Diseases
8
320 - Political science
7
620 - Engineering & allied operations
6
630 - Agriculture & related technologies
6
551 - Geology, hydrology & meteorology
5
614 - Incidence & prevention of disease
5
613 - Personal health & safety
4
658 - General management
4
338 - Production
3
540 - Chemistry & allied sciences
3
304 - Factors affecting social behavior
2
306 - Culture & institutions
2
365 - Penal & related institutions
2
372 - Elementary education
2
657 - Accounting
2
300 - Social sciences
1
302 - Social interaction
1
400 - Language
1
507 - Education, research & related topics
1
570 - Life sciences; biology
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
628 - Sanitary & municipal engineering
1
660 - Chemical engineering
1
720 - Architecture
1
956 - Middle East (Near East)
1