Classification
300 - Social sciences
320 - Political science
75
330 - Economics
75
630 - Agriculture & related technologies
25
900 - History & geography
18
333 - Economics of land & energy
16
610 - Medicine & health
14
140 - Specific philosophical schools
12
301 - Sociology & anthropology
12
340 - Law
12
363 - Other social problems & services
12
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
8
581 - Specific topics in natural history
8
620 - Engineering & allied operations
8
100 - Philosophy & psychology
7
600 - Technology
7
576 - Genetics & evolution
6
370 - Education
5
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
5
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
304 - Factors affecting social behavior
3
400 - Language
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
170 - Ethics
2
410 - Linguistics
2
520 - Astronomy & allied sciences
2
200 - Religion
1
361 - Social problems & social welfare in general
1
658 - General management
1
770 - Photography, photographs & computer art
1
780 - Music
1
800 - Literature & rhetoric
1