Classification
363 - Other social problems & services
370 - Education
333 - Economics of land & energy
13
700 - The arts; fine & decorative arts
12
900 - History & geography
10
000 - Computer science, information & general works
8
330 - Economics
8
140 - Specific philosophical schools
6
320 - Political science
6
380 - Commerce, communications & transportation
6
610 - Medicine & health
6
600 - Technology
5
620 - Engineering & allied operations
5
340 - Law
4
200 - Religion
3
300 - Social sciences
3
400 - Language
3
720 - Architecture
3
100 - Philosophy & psychology
2
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
658 - General management
1
800 - Literature & rhetoric
1