Classification
320 - Political science
330 - Economics
363 - Other social problems & services
600 - Technology
31
620 - Engineering & allied operations
333 - Economics of land & energy
26
700 - The arts; fine & decorative arts
15
000 - Computer science, information & general works
11
900 - History & geography
11
551 - Geology, hydrology & meteorology
9
140 - Specific philosophical schools
6
580 - Plants (Botany)
6
630 - Agriculture & related technologies
6
581 - Specific topics in natural history
5
610 - Medicine & health
5
300 - Social sciences
4
370 - Education
4
380 - Commerce, communications & transportation
4
657 - Accounting
3
658 - General management
3
350 - Public administration & military science
2
540 - Chemistry & allied sciences
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1