Classification
580 - Plants (Botany)
581 - Specific topics in natural history
155
500 - Natural sciences & mathematics
110
610 - Medicine & health
50
333 - Economics of land & energy
38
576 - Genetics & evolution
35
700 - The arts; fine & decorative arts
31
600 - Technology
28
363 - Other social problems & services
26
000 - Computer science, information & general works
19
620 - Engineering & allied operations
19
551 - Geology, hydrology & meteorology
14
900 - History & geography
13
330 - Economics
12
540 - Chemistry & allied sciences
12
612 - Human physiology
12
140 - Specific philosophical schools
11
380 - Commerce, communications & transportation
11
630 - Agriculture & related technologies
9
615 - Pharmacology & therapeutics
8
414 - Phonology & phonetics
4
720 - Architecture
4
304 - Factors affecting social behavior
3
340 - Law
3
400 - Language
2
658 - General management
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
530 - Physics
1
800 - Literature & rhetoric
1