Classification
576 - Genetics & evolution
580 - Plants (Botany)
900 - History & geography
600 - Technology
17
620 - Engineering & allied operations
17
700 - The arts; fine & decorative arts
17
333 - Economics of land & energy
15
363 - Other social problems & services
8
414 - Phonology & phonetics
6
000 - Computer science, information & general works
5
610 - Medicine & health
5
720 - Architecture
5
330 - Economics
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
1
658 - General management
1
770 - Photography, photographs & computer art
1