Classification
330 - Economics
18
320 - Political science
14
600 - Technology
14
333 - Economics of land & energy
12
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
8
380 - Commerce, communications & transportation
8
820 - English & Old English literatures
7
620 - Engineering & allied operations
6
900 - History & geography
6
340 - Law
5
360 - Social problems & services; associations
5
580 - Plants (Botany)
5
500 - Natural sciences & mathematics
3
530 - Physics
3
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
610 - Medicine & health
2
658 - General management
2
940 - History of Europe
2
070 - News media, journalism & publishing
1
140 - Specific philosophical schools
1
400 - Language
1
630 - Agriculture & related technologies
1
720 - Architecture
1
780 - Music
1
790 - Recreational & performing arts
1
800 - Literature & rhetoric
1