Classification
140 - Specific philosophical schools
363 - Other social problems & services
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
40
900 - History & geography
30
333 - Economics of land & energy
21
380 - Commerce, communications & transportation
20
330 - Economics
16
610 - Medicine & health
16
000 - Computer science, information & general works
14
576 - Genetics & evolution
12
580 - Plants (Botany)
11
720 - Architecture
11
551 - Geology, hydrology & meteorology
10
300 - Social sciences
8
340 - Law
8
320 - Political science
7
500 - Natural sciences & mathematics
7
370 - Education
6
581 - Specific topics in natural history
6
400 - Language
5
540 - Chemistry & allied sciences
5
630 - Agriculture & related technologies
5
612 - Human physiology
4
800 - Literature & rhetoric
4
170 - Ethics
3
414 - Phonology & phonetics
3
658 - General management
3
100 - Philosophy & psychology
2
200 - Religion
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
530 - Physics
1
657 - Accounting
1