Classification
320 - Political science
551 - Geology, hydrology & meteorology
363 - Other social problems & services
25
333 - Economics of land & energy
24
330 - Economics
19
000 - Computer science, information & general works
16
700 - The arts; fine & decorative arts
14
600 - Technology
13
610 - Medicine & health
9
581 - Specific topics in natural history
7
900 - History & geography
7
140 - Specific philosophical schools
6
380 - Commerce, communications & transportation
5
620 - Engineering & allied operations
5
658 - General management
5
304 - Factors affecting social behavior
4
576 - Genetics & evolution
3
297 - Islam, Babism & Bahai Faith
2
340 - Law
2
300 - Social sciences
1
360 - Social problems & services; associations
1
370 - Education
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1