Classification
140 - Specific philosophical schools
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
600 - Technology
700 - The arts; fine & decorative arts
5
363 - Other social problems & services
4
576 - Genetics & evolution
4
620 - Engineering & allied operations
4
900 - History & geography
4
320 - Political science
3
340 - Law
3
720 - Architecture
3
000 - Computer science, information & general works
2
330 - Economics
2
160 - Logic
1
333 - Economics of land & energy
1
370 - Education
1
410 - Linguistics
1
610 - Medicine & health
1