Classification
380 - Commerce, communications & transportation
620 - Engineering & allied operations
600 - Technology
22
900 - History & geography
16
700 - The arts; fine & decorative arts
15
000 - Computer science, information & general works
9
333 - Economics of land & energy
8
363 - Other social problems & services
4
610 - Medicine & health
4
140 - Specific philosophical schools
3
530 - Physics
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
2
304 - Factors affecting social behavior
1
340 - Law
1
370 - Education
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
650 - Management & auxiliary services
1
658 - General management
1