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