Classification
900 - History & geography
92
100 - Philosophy & psychology
29
500 - Natural sciences & mathematics
19
600 - Technology
18
610 - Medicine & health
18
300 - Social sciences
16
320 - Political science
10
700 - The arts; fine & decorative arts
9
120 - Epistemology, causation & humankind
6
140 - Specific philosophical schools
6
170 - Ethics
6
301 - Sociology & anthropology
5
363 - Other social problems & services
5
530 - Physics
5
370 - Education
4
000 - Computer science, information & general works
3
160 - Logic
3
200 - Religion
3
333 - Economics of land & energy
3
410 - Linguistics
3
520 - Astronomy & allied sciences
3
576 - Genetics & evolution
3
620 - Engineering & allied operations
3
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
400 - Language
2
304 - Factors affecting social behavior
1
330 - Economics
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
612 - Human physiology
1
658 - General management
1
720 - Architecture
1