Classification
330 - Economics
54
320 - Political science
47
820 - English & Old English literatures
39
900 - History & geography
39
700 - The arts; fine & decorative arts
25
600 - Technology
14
380 - Commerce, communications & transportation
13
333 - Economics of land & energy
11
340 - Law
11
620 - Engineering & allied operations
11
230 - Christianity & Christian theology
10
610 - Medicine & health
9
000 - Computer science, information & general works
8
363 - Other social problems & services
8
370 - Education
8
140 - Specific philosophical schools
7
100 - Philosophy & psychology
6
500 - Natural sciences & mathematics
6
800 - Literature & rhetoric
6
280 - Christian denominations & sects
5
300 - Social sciences
5
400 - Language
5
410 - Linguistics
4
530 - Physics
4
576 - Genetics & evolution
4
170 - Ethics
3
301 - Sociology & anthropology
3
720 - Architecture
3
160 - Logic
2
200 - Religion
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
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
540 - Chemistry & allied sciences
1
580 - Plants (Botany)
1
780 - Music
1