Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
330 - Economics
370 - Education
600 - Technology
4
300 - Social sciences
3
900 - History & geography
3
170 - Ethics
2
301 - Sociology & anthropology
2
320 - Political science
2
333 - Economics of land & energy
2
340 - Law
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
200 - Religion
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
576 - Genetics & evolution
1
610 - Medicine & health
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1