Classification
320 - Political science
363 - Other social problems & services
600 - Technology
900 - History & geography
620 - Engineering & allied operations
32
700 - The arts; fine & decorative arts
22
333 - Economics of land & energy
18
330 - Economics
15
380 - Commerce, communications & transportation
13
551 - Geology, hydrology & meteorology
13
000 - Computer science, information & general works
8
370 - Education
7
610 - Medicine & health
7
720 - Architecture
7
140 - Specific philosophical schools
6
300 - Social sciences
6
581 - Specific topics in natural history
6
576 - Genetics & evolution
5
340 - Law
4
580 - Plants (Botany)
4
500 - Natural sciences & mathematics
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
200 - Religion
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
658 - General management
2
170 - Ethics
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
657 - Accounting
1
800 - Literature & rhetoric
1