Classification
300 - Social sciences
320 - Political science
380 - Commerce, communications & transportation
600 - Technology
330 - Economics
10
900 - History & geography
8
370 - Education
6
620 - Engineering & allied operations
6
400 - Language
5
100 - Philosophy & psychology
4
363 - Other social problems & services
4
340 - Law
3
500 - Natural sciences & mathematics
3
700 - The arts; fine & decorative arts
3
780 - Music
3
000 - Computer science, information & general works
2
200 - Religion
2
333 - Economics of land & energy
2
410 - Linguistics
2
551 - Geology, hydrology & meteorology
2
140 - Specific philosophical schools
1
170 - Ethics
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
540 - Chemistry & allied sciences
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1
920 - Biography, genealogy & insignia
1