Classification
330 - Economics
610 - Medicine & health
304 - Factors affecting social behavior
98
333 - Economics of land & energy
57
320 - Political science
53
363 - Other social problems & services
39
700 - The arts; fine & decorative arts
39
370 - Education
33
600 - Technology
24
000 - Computer science, information & general works
23
140 - Specific philosophical schools
22
380 - Commerce, communications & transportation
15
361 - Social problems & social welfare in general
14
900 - History & geography
13
551 - Geology, hydrology & meteorology
12
340 - Law
11
580 - Plants (Botany)
11
620 - Engineering & allied operations
10
658 - General management
10
630 - Agriculture & related technologies
8
720 - Architecture
7
100 - Philosophy & psychology
5
362 - Social welfare problems & services
5
170 - Ethics
4
300 - Social sciences
4
305 - Social groups
3
360 - Social problems & services; associations
3
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
657 - Accounting
3
200 - Religion
2
338 - Production
2
372 - Elementary education
2
550 - Earth sciences
2
780 - Music
2
301 - Sociology & anthropology
1
336 - Public finance
1
350 - Public administration & military science
1
371 - Schools & their activities; special education
1
400 - Language
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
614 - Incidence & prevention of disease
1
800 - Literature & rhetoric
1