Classification
581 - Specific topics in natural history
363 - Other social problems & services
38
000 - Computer science, information & general works
29
700 - The arts; fine & decorative arts
28
333 - Economics of land & energy
26
320 - Political science
25
551 - Geology, hydrology & meteorology
22
140 - Specific philosophical schools
19
330 - Economics
19
900 - History & geography
18
610 - Medicine & health
16
600 - Technology
13
580 - Plants (Botany)
10
380 - Commerce, communications & transportation
8
620 - Engineering & allied operations
8
720 - Architecture
8
630 - Agriculture & related technologies
7
800 - Literature & rhetoric
5
200 - Religion
4
300 - Social sciences
4
370 - Education
4
414 - Phonology & phonetics
4
576 - Genetics & evolution
4
658 - General management
3
170 - Ethics
2
304 - Factors affecting social behavior
2
340 - Law
2
361 - Social problems & social welfare in general
2
400 - Language
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
364 - Criminology
1
410 - Linguistics
1
530 - Physics
1
612 - Human physiology
1