Classification
000 - Computer science, information & general works
610 - Medicine & health
700 - The arts; fine & decorative arts
24
330 - Economics
23
363 - Other social problems & services
23
600 - Technology
22
333 - Economics of land & energy
17
140 - Specific philosophical schools
16
320 - Political science
12
370 - Education
12
380 - Commerce, communications & transportation
12
551 - Geology, hydrology & meteorology
12
580 - Plants (Botany)
12
658 - General management
11
630 - Agriculture & related technologies
7
620 - Engineering & allied operations
6
340 - Law
4
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
720 - Architecture
4
900 - History & geography
4
170 - Ethics
3
300 - Social sciences
3
361 - Social problems & social welfare in general
3
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
360 - Social problems & services; associations
2
500 - Natural sciences & mathematics
2
550 - Earth sciences
2
612 - Human physiology
2
616 - Diseases
2
001 - Knowledge
1
100 - Philosophy & psychology
1
362 - Social welfare problems & services
1
540 - Chemistry & allied sciences
1
657 - Accounting
1