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