Classification
580 - Plants (Botany)
333 - Economics of land & energy
34
600 - Technology
34
000 - Computer science, information & general works
28
620 - Engineering & allied operations
28
700 - The arts; fine & decorative arts
27
363 - Other social problems & services
26
330 - Economics
23
900 - History & geography
20
380 - Commerce, communications & transportation
17
551 - Geology, hydrology & meteorology
16
610 - Medicine & health
14
630 - Agriculture & related technologies
9
140 - Specific philosophical schools
8
414 - Phonology & phonetics
7
540 - Chemistry & allied sciences
7
576 - Genetics & evolution
7
581 - Specific topics in natural history
6
500 - Natural sciences & mathematics
5
612 - Human physiology
5
658 - General management
4
720 - Architecture
4
300 - Social sciences
3
320 - Political science
3
340 - Law
3
530 - Physics
3
304 - Factors affecting social behavior
2
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
550 - Earth sciences
1
791 - Public performances
1