Classification
333 - Economics of land & energy
6
610 - Medicine & health
6
000 - Computer science, information & general works
5
700 - The arts; fine & decorative arts
5
540 - Chemistry & allied sciences
4
140 - Specific philosophical schools
3
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
600 - Technology
2
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
612 - Human physiology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
900 - History & geography
1