Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
49
700 - The arts; fine & decorative arts
48
900 - History & geography
45
000 - Computer science, information & general works
38
363 - Other social problems & services
36
333 - Economics of land & energy
31
330 - Economics
30
610 - Medicine & health
27
320 - Political science
16
576 - Genetics & evolution
16
370 - Education
14
340 - Law
11
400 - Language
11
630 - Agriculture & related technologies
11
720 - Architecture
11
500 - Natural sciences & mathematics
10
580 - Plants (Botany)
10
800 - Literature & rhetoric
9
551 - Geology, hydrology & meteorology
8
581 - Specific topics in natural history
8
658 - General management
8
304 - Factors affecting social behavior
6
100 - Philosophy & psychology
5
361 - Social problems & social welfare in general
5
170 - Ethics
4
410 - Linguistics
4
200 - Religion
3
300 - Social sciences
3
540 - Chemistry & allied sciences
2
612 - Human physiology
2
657 - Accounting
2
160 - Logic
1
301 - Sociology & anthropology
1
336 - Public finance
1
414 - Phonology & phonetics
1