Classification
340 - Law
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
900 - History & geography
18
363 - Other social problems & services
14
700 - The arts; fine & decorative arts
11
333 - Economics of land & energy
10
330 - Economics
9
140 - Specific philosophical schools
8
500 - Natural sciences & mathematics
8
320 - Political science
6
576 - Genetics & evolution
6
580 - Plants (Botany)
6
720 - Architecture
6
000 - Computer science, information & general works
5
370 - Education
4
610 - Medicine & health
4
630 - Agriculture & related technologies
4
300 - Social sciences
3
400 - Language
3
170 - Ethics
2
551 - Geology, hydrology & meteorology
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
530 - Physics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1
658 - General management
1
780 - Music
1