Classification
363 - Other social problems & services
330 - Economics
23
333 - Economics of land & energy
21
600 - Technology
15
380 - Commerce, communications & transportation
14
700 - The arts; fine & decorative arts
13
000 - Computer science, information & general works
12
320 - Political science
12
610 - Medicine & health
12
620 - Engineering & allied operations
8
140 - Specific philosophical schools
7
370 - Education
7
551 - Geology, hydrology & meteorology
7
630 - Agriculture & related technologies
6
658 - General management
5
581 - Specific topics in natural history
4
304 - Factors affecting social behavior
3
340 - Law
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
900 - History & geography
3
100 - Philosophy & psychology
2
361 - Social problems & social welfare in general
2
400 - Language
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
657 - Accounting
2
800 - Literature & rhetoric
2
160 - Logic
1
170 - Ethics
1
200 - Religion
1
336 - Public finance
1
550 - Earth sciences
1
612 - Human physiology
1
720 - Architecture
1