Classification
000 - Computer science, information & general works
30
330 - Economics
30
580 - Plants (Botany)
30
363 - Other social problems & services
25
551 - Geology, hydrology & meteorology
23
333 - Economics of land & energy
21
600 - Technology
21
630 - Agriculture & related technologies
21
700 - The arts; fine & decorative arts
19
620 - Engineering & allied operations
17
414 - Phonology & phonetics
9
380 - Commerce, communications & transportation
8
320 - Political science
7
610 - Medicine & health
7
581 - Specific topics in natural history
6
900 - History & geography
6
612 - Human physiology
5
720 - Architecture
5
140 - Specific philosophical schools
4
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
170 - Ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
340 - Law
1
540 - Chemistry & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1
800 - Literature & rhetoric
1