Classification
140 - Specific philosophical schools
610 - Medicine & health
700 - The arts; fine & decorative arts
29
330 - Economics
22
000 - Computer science, information & general works
16
320 - Political science
16
363 - Other social problems & services
16
333 - Economics of land & energy
12
380 - Commerce, communications & transportation
11
580 - Plants (Botany)
8
170 - Ethics
7
304 - Factors affecting social behavior
7
900 - History & geography
7
340 - Law
6
370 - Education
6
551 - Geology, hydrology & meteorology
6
600 - Technology
6
658 - General management
6
300 - Social sciences
4
581 - Specific topics in natural history
4
620 - Engineering & allied operations
4
630 - Agriculture & related technologies
4
100 - Philosophy & psychology
3
361 - Social problems & social welfare in general
3
360 - Social problems & services; associations
2
576 - Genetics & evolution
2
200 - Religion
1
301 - Sociology & anthropology
1
338 - Production
1
350 - Public administration & military science
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
612 - Human physiology
1
614 - Incidence & prevention of disease
1
629 - Other branches of engineering
1
657 - Accounting
1
720 - Architecture
1
780 - Music
1