Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
28
900 - History & geography
27
363 - Other social problems & services
25
000 - Computer science, information & general works
22
330 - Economics
21
610 - Medicine & health
17
333 - Economics of land & energy
16
576 - Genetics & evolution
13
320 - Political science
11
720 - Architecture
11
340 - Law
8
370 - Education
7
400 - Language
7
500 - Natural sciences & mathematics
7
630 - Agriculture & related technologies
7
800 - Literature & rhetoric
6
304 - Factors affecting social behavior
5
580 - Plants (Botany)
5
581 - Specific topics in natural history
5
200 - Religion
3
300 - Social sciences
3
361 - Social problems & social welfare in general
3
551 - Geology, hydrology & meteorology
3
658 - General management
3
100 - Philosophy & psychology
2
170 - Ethics
2
612 - Human physiology
2
160 - Logic
1
301 - Sociology & anthropology
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1