Classification
140 - Specific philosophical schools
330 - Economics
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
37
363 - Other social problems & services
32
000 - Computer science, information & general works
31
600 - Technology
30
333 - Economics of land & energy
29
610 - Medicine & health
25
900 - History & geography
18
320 - Political science
17
551 - Geology, hydrology & meteorology
15
620 - Engineering & allied operations
14
370 - Education
13
576 - Genetics & evolution
10
658 - General management
9
400 - Language
7
630 - Agriculture & related technologies
7
581 - Specific topics in natural history
6
720 - Architecture
6
100 - Philosophy & psychology
5
304 - Factors affecting social behavior
5
580 - Plants (Botany)
5
800 - Literature & rhetoric
5
170 - Ethics
4
340 - Law
4
500 - Natural sciences & mathematics
4
300 - Social sciences
3
414 - Phonology & phonetics
3
657 - Accounting
3
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
540 - Chemistry & allied sciences
2
160 - Logic
1
336 - Public finance
1
530 - Physics
1
550 - Earth sciences
1