Classification
330 - Economics
333 - Economics of land & energy
52
320 - Political science
34
700 - The arts; fine & decorative arts
24
300 - Social sciences
23
370 - Education
21
600 - Technology
19
610 - Medicine & health
18
140 - Specific philosophical schools
17
363 - Other social problems & services
16
340 - Law
15
000 - Computer science, information & general works
13
900 - History & geography
13
100 - Philosophy & psychology
12
380 - Commerce, communications & transportation
12
304 - Factors affecting social behavior
10
170 - Ethics
8
576 - Genetics & evolution
8
200 - Religion
6
551 - Geology, hydrology & meteorology
6
620 - Engineering & allied operations
6
361 - Social problems & social welfare in general
5
500 - Natural sciences & mathematics
4
301 - Sociology & anthropology
3
581 - Specific topics in natural history
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
350 - Public administration & military science
2
360 - Social problems & services; associations
2
410 - Linguistics
2
530 - Physics
2
400 - Language
1
510 - Mathematics
1
515 - Analysis
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1