Classification
140 - Specific philosophical schools
600 - Technology
43
700 - The arts; fine & decorative arts
43
333 - Economics of land & energy
36
900 - History & geography
30
620 - Engineering & allied operations
29
610 - Medicine & health
27
330 - Economics
24
363 - Other social problems & services
24
000 - Computer science, information & general works
23
320 - Political science
23
380 - Commerce, communications & transportation
22
340 - Law
16
580 - Plants (Botany)
11
576 - Genetics & evolution
10
200 - Religion
9
720 - Architecture
8
370 - Education
6
500 - Natural sciences & mathematics
6
551 - Geology, hydrology & meteorology
6
581 - Specific topics in natural history
6
800 - Literature & rhetoric
6
400 - Language
5
297 - Islam, Babism & Bahai Faith
4
304 - Factors affecting social behavior
4
414 - Phonology & phonetics
4
100 - Philosophy & psychology
3
170 - Ethics
3
301 - Sociology & anthropology
3
530 - Physics
3
540 - Chemistry & allied sciences
3
630 - Agriculture & related technologies
3
300 - Social sciences
2
410 - Linguistics
2
612 - Human physiology
2
658 - General management
2
120 - Epistemology, causation & humankind
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1