Classification
600 - Technology
8
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
6
900 - History & geography
6
140 - Specific philosophical schools
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
720 - Architecture
4
320 - Political science
3
340 - Law
3
363 - Other social problems & services
3
576 - Genetics & evolution
3
000 - Computer science, information & general works
1
333 - Economics of land & energy
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1