Classification
000 - Computer science, information & general works
35
580 - Plants (Botany)
33
700 - The arts; fine & decorative arts
28
551 - Geology, hydrology & meteorology
26
620 - Engineering & allied operations
22
363 - Other social problems & services
21
600 - Technology
21
333 - Economics of land & energy
16
630 - Agriculture & related technologies
13
900 - History & geography
12
610 - Medicine & health
11
581 - Specific topics in natural history
10
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
414 - Phonology & phonetics
7
576 - Genetics & evolution
7
612 - Human physiology
6
330 - Economics
5
320 - Political science
4
500 - Natural sciences & mathematics
4
658 - General management
4
300 - Social sciences
3
540 - Chemistry & allied sciences
3
550 - Earth sciences
3
340 - Law
2
590 - Animals (Zoology)
2
650 - Management & auxiliary services
2
720 - Architecture
2
304 - Factors affecting social behavior
1