Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
333 - Economics of land & energy
28
000 - Computer science, information & general works
23
700 - The arts; fine & decorative arts
23
600 - Technology
19
140 - Specific philosophical schools
18
330 - Economics
16
610 - Medicine & health
16
320 - Political science
14
551 - Geology, hydrology & meteorology
14
900 - History & geography
11
580 - Plants (Botany)
10
620 - Engineering & allied operations
10
658 - General management
6
630 - Agriculture & related technologies
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
581 - Specific topics in natural history
4
720 - Architecture
4
300 - Social sciences
3
370 - Education
3
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
100 - Philosophy & psychology
2
170 - Ethics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
650 - Management & auxiliary services
2
120 - Epistemology, causation & humankind
1
200 - Religion
1
340 - Law
1
550 - Earth sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1