Classification
330 - Economics
178
320 - Political science
156
620 - Engineering & allied operations
104
340 - Law
44
700 - The arts; fine & decorative arts
41
600 - Technology
40
333 - Economics of land & energy
29
000 - Computer science, information & general works
27
900 - History & geography
27
363 - Other social problems & services
25
630 - Agriculture & related technologies
24
551 - Geology, hydrology & meteorology
18
380 - Commerce, communications & transportation
13
580 - Plants (Botany)
12
540 - Chemistry & allied sciences
9
610 - Medicine & health
9
581 - Specific topics in natural history
8
140 - Specific philosophical schools
7
300 - Social sciences
7
414 - Phonology & phonetics
7
576 - Genetics & evolution
7
500 - Natural sciences & mathematics
4
720 - Architecture
3
304 - Factors affecting social behavior
2
530 - Physics
2
627 - Hydraulic engineering
2
628 - Sanitary & municipal engineering
2
658 - General management
2
800 - Literature & rhetoric
2
160 - Logic
1
170 - Ethics
1
550 - Earth sciences
1
612 - Human physiology
1
650 - Management & auxiliary services
1