Classification
140 - Specific philosophical schools
720 - Architecture
700 - The arts; fine & decorative arts
39
900 - History & geography
34
620 - Engineering & allied operations
29
363 - Other social problems & services
25
600 - Technology
22
000 - Computer science, information & general works
19
333 - Economics of land & energy
17
320 - Political science
15
380 - Commerce, communications & transportation
15
330 - Economics
14
300 - Social sciences
11
340 - Law
11
610 - Medicine & health
10
576 - Genetics & evolution
7
800 - Literature & rhetoric
7
370 - Education
6
400 - Language
6
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
200 - Religion
4
500 - Natural sciences & mathematics
4
581 - Specific topics in natural history
4
170 - Ethics
3
301 - Sociology & anthropology
3
658 - General management
3
100 - Philosophy & psychology
2
410 - Linguistics
2
630 - Agriculture & related technologies
2
780 - Music
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
550 - Earth sciences
1
612 - Human physiology
1