Classification
100 - Philosophy & psychology
370 - Education
410 - Linguistics
900 - History & geography
300 - Social sciences
4
400 - Language
4
320 - Political science
3
330 - Economics
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
600 - Technology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
770 - Photography, photographs & computer art
2
780 - Music
2
200 - Religion
1
340 - Law
1
380 - Commerce, communications & transportation
1
576 - Genetics & evolution
1
658 - General management
1
800 - Literature & rhetoric
1