Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
900 - History & geography
620 - Engineering & allied operations
44
333 - Economics of land & energy
32
330 - Economics
20
000 - Computer science, information & general works
19
720 - Architecture
16
140 - Specific philosophical schools
14
320 - Political science
10
576 - Genetics & evolution
10
370 - Education
9
610 - Medicine & health
9
551 - Geology, hydrology & meteorology
8
580 - Plants (Botany)
8
340 - Law
7
400 - Language
4
500 - Natural sciences & mathematics
4
658 - General management
4
800 - Literature & rhetoric
4
581 - Specific topics in natural history
3
170 - Ethics
2
200 - Religion
2
300 - Social sciences
2
530 - Physics
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
650 - Management & auxiliary services
1