Classification
333 - Economics of land & energy
363 - Other social problems & services
29
330 - Economics
19
700 - The arts; fine & decorative arts
18
320 - Political science
15
000 - Computer science, information & general works
14
140 - Specific philosophical schools
14
551 - Geology, hydrology & meteorology
12
900 - History & geography
12
600 - Technology
11
580 - Plants (Botany)
10
630 - Agriculture & related technologies
10
380 - Commerce, communications & transportation
9
620 - Engineering & allied operations
9
581 - Specific topics in natural history
8
610 - Medicine & health
6
576 - Genetics & evolution
5
800 - Literature & rhetoric
5
340 - Law
4
170 - Ethics
3
300 - Social sciences
3
304 - Factors affecting social behavior
3
658 - General management
3
720 - Architecture
3
301 - Sociology & anthropology
2
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
770 - Photography, photographs & computer art
1