Classification
330 - Economics
55
320 - Political science
47
820 - English & Old English literatures
39
900 - History & geography
37
700 - The arts; fine & decorative arts
23
600 - Technology
14
333 - Economics of land & energy
11
340 - Law
11
380 - Commerce, communications & transportation
11
620 - Engineering & allied operations
11
230 - Christianity & Christian theology
10
140 - Specific philosophical schools
9
610 - Medicine & health
9
000 - Computer science, information & general works
8
363 - Other social problems & services
8
370 - Education
7
100 - Philosophy & psychology
6
800 - Literature & rhetoric
6
280 - Christian denominations & sects
5
500 - Natural sciences & mathematics
5
400 - Language
4
530 - Physics
4
576 - Genetics & evolution
4
170 - Ethics
3
300 - Social sciences
3
410 - Linguistics
3
720 - Architecture
3
160 - Logic
2
200 - Religion
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
660 - Chemical engineering
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
327 - International relations
1
336 - Public finance
1
346 - Private law
1
414 - Phonology & phonetics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
780 - Music
1