Classification
140 - Specific philosophical schools
370 - Education
900 - History & geography
100 - Philosophy & psychology
16
320 - Political science
13
333 - Economics of land & energy
11
700 - The arts; fine & decorative arts
11
300 - Social sciences
10
330 - Economics
10
600 - Technology
10
620 - Engineering & allied operations
8
170 - Ethics
7
200 - Religion
7
363 - Other social problems & services
7
800 - Literature & rhetoric
7
000 - Computer science, information & general works
5
380 - Commerce, communications & transportation
5
400 - Language
5
576 - Genetics & evolution
5
301 - Sociology & anthropology
4
610 - Medicine & health
4
340 - Law
3
410 - Linguistics
2
414 - Phonology & phonetics
2
551 - Geology, hydrology & meteorology
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
780 - Music
2
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
838 - German miscellaneous writings
1