Classification
333 - Economics of land & energy
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
45
900 - History & geography
34
363 - Other social problems & services
27
330 - Economics
25
000 - Computer science, information & general works
13
320 - Political science
13
610 - Medicine & health
12
380 - Commerce, communications & transportation
10
370 - Education
9
551 - Geology, hydrology & meteorology
9
140 - Specific philosophical schools
8
630 - Agriculture & related technologies
6
720 - Architecture
6
300 - Social sciences
5
500 - Natural sciences & mathematics
5
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
170 - Ethics
3
340 - Law
3
658 - General management
3
100 - Philosophy & psychology
2
200 - Religion
2
304 - Factors affecting social behavior
2
410 - Linguistics
2
530 - Physics
2
580 - Plants (Botany)
2
800 - Literature & rhetoric
2
160 - Logic
1
350 - Public administration & military science
1
400 - Language
1
540 - Chemistry & allied sciences
1
657 - Accounting
1