Classification
100 - Philosophy & psychology
780 - Music
900 - History & geography
700 - The arts; fine & decorative arts
12
300 - Social sciences
10
330 - Economics
7
600 - Technology
7
320 - Political science
6
370 - Education
6
301 - Sociology & anthropology
5
400 - Language
5
620 - Engineering & allied operations
5
380 - Commerce, communications & transportation
4
410 - Linguistics
4
000 - Computer science, information & general works
3
140 - Specific philosophical schools
3
200 - Religion
3
630 - Agriculture & related technologies
3
720 - Architecture
3
800 - Literature & rhetoric
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
530 - Physics
2
610 - Medicine & health
2
770 - Photography, photographs & computer art
2
340 - Law
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
590 - Animals (Zoology)
1
658 - General management
1
791 - Public performances
1