Classification
333 - Economics of land & energy
320 - Political science
32
330 - Economics
21
363 - Other social problems & services
16
600 - Technology
11
700 - The arts; fine & decorative arts
10
370 - Education
8
380 - Commerce, communications & transportation
8
336 - Public finance
5
900 - History & geography
5
000 - Computer science, information & general works
4
610 - Medicine & health
4
300 - Social sciences
3
304 - Factors affecting social behavior
3
620 - Engineering & allied operations
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
338 - Production
2
340 - Law
2
361 - Social problems & social welfare in general
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
200 - Religion
1
360 - Social problems & services; associations
1
410 - Linguistics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
621 - Applied physics
1
770 - Photography, photographs & computer art
1