Classification
000 - Computer science, information & general works
304 - Factors affecting social behavior
363 - Other social problems & services
11
333 - Economics of land & energy
9
630 - Agriculture & related technologies
9
320 - Political science
8
330 - Economics
8
700 - The arts; fine & decorative arts
7
551 - Geology, hydrology & meteorology
6
600 - Technology
6
610 - Medicine & health
6
576 - Genetics & evolution
5
580 - Plants (Botany)
5
581 - Specific topics in natural history
5
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
4
140 - Specific philosophical schools
3
414 - Phonology & phonetics
3
361 - Social problems & social welfare in general
2
370 - Education
2
900 - History & geography
2
300 - Social sciences
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
658 - General management
1