Classification
320 - Political science
330 - Economics
900 - History & geography
576 - Genetics & evolution
6
380 - Commerce, communications & transportation
5
700 - The arts; fine & decorative arts
5
300 - Social sciences
4
340 - Law
4
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
304 - Factors affecting social behavior
2
800 - Literature & rhetoric
2
140 - Specific philosophical schools
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
336 - Public finance
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
500 - Natural sciences & mathematics
1
600 - Technology
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
791 - Public performances
1