Classification
330 - Economics
320 - Political science
53
100 - Philosophy & psychology
43
900 - History & geography
18
300 - Social sciences
11
140 - Specific philosophical schools
5
200 - Religion
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
500 - Natural sciences & mathematics
3
657 - Accounting
3
720 - Architecture
3
304 - Factors affecting social behavior
2
340 - Law
2
350 - Public administration & military science
2
600 - Technology
2
620 - Engineering & allied operations
2
000 - Computer science, information & general works
1
170 - Ethics
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
370 - Education
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
780 - Music
1
800 - Literature & rhetoric
1