Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
23
330 - Economics
17
620 - Engineering & allied operations
17
363 - Other social problems & services
16
900 - History & geography
14
370 - Education
10
333 - Economics of land & energy
9
610 - Medicine & health
9
320 - Political science
8
576 - Genetics & evolution
6
400 - Language
5
658 - General management
5
100 - Philosophy & psychology
4
340 - Law
4
500 - Natural sciences & mathematics
4
581 - Specific topics in natural history
4
720 - Architecture
4
200 - Religion
3
361 - Social problems & social welfare in general
3
551 - Geology, hydrology & meteorology
3
630 - Agriculture & related technologies
3
410 - Linguistics
2
580 - Plants (Botany)
2
657 - Accounting
2
800 - Literature & rhetoric
2
160 - Logic
1
170 - Ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1