Classification
140 - Specific philosophical schools
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
13
000 - Computer science, information & general works
10
363 - Other social problems & services
10
610 - Medicine & health
9
333 - Economics of land & energy
8
380 - Commerce, communications & transportation
7
900 - History & geography
7
330 - Economics
6
320 - Political science
4
370 - Education
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
340 - Law
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
658 - General management
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
780 - Music
1