Classification
300 - Social sciences
330 - Economics
400 - Language
600 - Technology
320 - Political science
5
380 - Commerce, communications & transportation
5
900 - History & geography
5
100 - Philosophy & psychology
4
370 - Education
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
4
340 - Law
3
780 - Music
3
000 - Computer science, information & general works
2
363 - Other social problems & services
2
410 - Linguistics
2
140 - Specific philosophical schools
1
200 - Religion
1
301 - Sociology & anthropology
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1