Classification
000 - Computer science, information & general works
330 - Economics
363 - Other social problems & services
380 - Commerce, communications & transportation
333 - Economics of land & energy
37
700 - The arts; fine & decorative arts
31
600 - Technology
25
140 - Specific philosophical schools
20
900 - History & geography
17
320 - Political science
16
551 - Geology, hydrology & meteorology
16
610 - Medicine & health
14
620 - Engineering & allied operations
13
370 - Education
9
576 - Genetics & evolution
9
720 - Architecture
9
340 - Law
8
580 - Plants (Botany)
7
658 - General management
7
414 - Phonology & phonetics
5
581 - Specific topics in natural history
5
630 - Agriculture & related technologies
5
304 - Factors affecting social behavior
4
400 - Language
4
530 - Physics
4
657 - Accounting
4
410 - Linguistics
3
500 - Natural sciences & mathematics
3
200 - Religion
2
300 - Social sciences
2
800 - Literature & rhetoric
2
160 - Logic
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
612 - Human physiology
1