Classification
551 - Geology, hydrology & meteorology
330 - Economics
10
333 - Economics of land & energy
9
700 - The arts; fine & decorative arts
9
363 - Other social problems & services
8
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
000 - Computer science, information & general works
6
600 - Technology
6
610 - Medicine & health
6
370 - Education
5
320 - Political science
4
900 - History & geography
4
720 - Architecture
3
530 - Physics
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
658 - General management
2
170 - Ethics
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1