Classification
576 - Genetics & evolution
580 - Plants (Botany)
600 - Technology
620 - Engineering & allied operations
900 - History & geography
17
700 - The arts; fine & decorative arts
16
333 - Economics of land & energy
14
363 - Other social problems & services
10
630 - Agriculture & related technologies
6
000 - Computer science, information & general works
5
330 - Economics
5
140 - Specific philosophical schools
4
414 - Phonology & phonetics
4
720 - Architecture
4
170 - Ethics
3
340 - Law
3
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
800 - Literature & rhetoric
3
300 - Social sciences
2
320 - Political science
2
658 - General management
2
304 - Factors affecting social behavior
1
540 - Chemistry & allied sciences
1
770 - Photography, photographs & computer art
1