Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
54
900 - History & geography
50
333 - Economics of land & energy
49
000 - Computer science, information & general works
37
330 - Economics
30
140 - Specific philosophical schools
24
610 - Medicine & health
21
320 - Political science
20
720 - Architecture
18
370 - Education
15
576 - Genetics & evolution
15
580 - Plants (Botany)
15
340 - Law
12
551 - Geology, hydrology & meteorology
12
630 - Agriculture & related technologies
8
500 - Natural sciences & mathematics
7
658 - General management
6
400 - Language
5
581 - Specific topics in natural history
5
800 - Literature & rhetoric
5
300 - Social sciences
4
304 - Factors affecting social behavior
4
170 - Ethics
3
200 - Religion
3
414 - Phonology & phonetics
3
530 - Physics
3
361 - Social problems & social welfare in general
2
540 - Chemistry & allied sciences
2
612 - Human physiology
2
650 - Management & auxiliary services
2
657 - Accounting
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
160 - Logic
1
301 - Sociology & anthropology
1
410 - Linguistics
1