Classification
000 - Computer science, information & general works
333 - Economics of land & energy
600 - Technology
658 - General management
700 - The arts; fine & decorative arts
330 - Economics
12
610 - Medicine & health
7
620 - Engineering & allied operations
7
363 - Other social problems & services
6
320 - Political science
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
900 - History & geography
3
140 - Specific philosophical schools
2
300 - Social sciences
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
500 - Natural sciences & mathematics
1
581 - Specific topics in natural history
1