Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
330 - Economics
370 - Education
600 - Technology
380 - Commerce, communications & transportation
4
333 - Economics of land & energy
3
363 - Other social problems & services
3
700 - The arts; fine & decorative arts
3
320 - Political science
2
160 - Logic
1
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
657 - Accounting
1
720 - Architecture
1
900 - History & geography
1