Classification
600 - Technology
900 - History & geography
620 - Engineering & allied operations
17
630 - Agriculture & related technologies
10
300 - Social sciences
6
000 - Computer science, information & general works
5
363 - Other social problems & services
5
610 - Medicine & health
5
700 - The arts; fine & decorative arts
5
800 - Literature & rhetoric
5
100 - Philosophy & psychology
4
320 - Political science
4
333 - Economics of land & energy
4
330 - Economics
3
380 - Commerce, communications & transportation
3
140 - Specific philosophical schools
2
200 - Religion
2
301 - Sociology & anthropology
2
370 - Education
2
410 - Linguistics
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
791 - Public performances
2
170 - Ethics
1
304 - Factors affecting social behavior
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
780 - Music
1