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