Classification
140 - Specific philosophical schools
333 - Economics of land & energy
610 - Medicine & health
620 - Engineering & allied operations
29
600 - Technology
23
700 - The arts; fine & decorative arts
22
363 - Other social problems & services
17
000 - Computer science, information & general works
15
900 - History & geography
12
330 - Economics
11
380 - Commerce, communications & transportation
11
580 - Plants (Botany)
11
630 - Agriculture & related technologies
8
540 - Chemistry & allied sciences
7
300 - Social sciences
6
551 - Geology, hydrology & meteorology
6
576 - Genetics & evolution
6
581 - Specific topics in natural history
6
500 - Natural sciences & mathematics
5
658 - General management
5
414 - Phonology & phonetics
3
612 - Human physiology
3
800 - Literature & rhetoric
3
170 - Ethics
2
320 - Political science
2
340 - Law
2
370 - Education
2
720 - Architecture
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
361 - Social problems & social welfare in general
1
530 - Physics
1